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KUIU’s quest for the finest ingredients led us to Nuyarn by the Merino Company in New Zealand, where they take their wool remarkably seriously. Nuyarn is not a new fabric, it’s a new way of making fabric. Traditional ring spun yarn twists the life out of yarn. Nuyarn doesn’t.


Classic yarns twist fibers together for strength, which leaves ends poking out. Nuyarn takes the twist out, and instead lays fibers along the same orientation as the rest of the yarn, so fabrics feel less prickly and more comfortable yet become stronger. The unique yarn orientation creates more loft while significantly reducing weight. Nuyarn lower-density fabrics let lighter-weight garments outperform heavier traditional ring spun garments.


KUIU’s ULTRA Merino 125 ultra-lightweight shirt is the perfect blend of wool and nylon providing yet another option for the highly active hunter. Cooling and wicking moisture when it’s hot or providing insulation when it’s cold, the 125 is an ideal choice for hunters needing an all-around solution.

We recommend only Superfine Merino for next to skin. Superfine Merino 15 –18.5 micron has no itch, is very soft and comfortable. Microns are the unit of measurement used to express a wool fibers diameter. The lower the micron of a fiber the finer it is. The finer the wool, the softer it is next to skin.

Through extensive research we found that 17.5 micron is the best balance of next to skin comfort and durability. Unlike coarser micron wools, Superfine Merino fibers bend with pressure against the skin, flexing so as not to agitate the nerves, which creates the itchy feeling people often experience with wool products.
Classic yarns twist fibers together for strength, which leaves ends poking out. Nuyarn takes the twist out, and instead lays fibers along the same orientation as the rest of the yarn, so fabrics feel less prickly and more comfortable yet become stronger. The unique yarn orientation creates more loft while significantly reducing weight. Nuyarn lower-density fabrics let lighter-weight garments outperform heavier traditional ring spun garments.
Nuyarn uses a Wool Nylon blend to increase loft, stretch, dry times, warmth and strength.
Our lightest base layer for warmest-weather hunts on its own, or the next-to-skin layer on colder hunts.
The breathability, or the ability to dissipate perspiration, of Merino fabrics brings about temperature changes where two things can happen:

1) When there is a rise in humidity in the microclimate between the skin and the merino fabric, moisture vapor is absorbed then transported and released into the air outside of the fabric, keeping you dry, reducing clamminess, and creating a noticeable drop in temperature for the wearer.

2) Conversely, if the ambient temperature should drop, air is trapped between the fibers and creates an insulating effect. Moisture from your body (sweat) can be absorbed by Merino and converted to a bound liquid then moved to the exterior of the garment to evaporate, a process that produces a rise in temperature known as ‘heat of sorption’.
When there is a rise in humidity in the microclimate between the skin and the merino fabric, moisture vapor is absorbed then transported and released into the air outside of the fabric, keeping you dry, reducing clamminess, and creating a noticeable drop in temperature for the wearer. This evaporation speeds the dry time of the material as well as keeping you cool.
Merino is naturally odor reducing due to its physical and chemical structure. Merino has the ability to absorb and transport moisture (sweat) away from the skin where it evaporates into the air and prevents bacteria from developing and creating unpleasant body odors. Sweat itself has no odor, but if it is allowed to remain on the skin, bacteria will develop and so will body odors. Merino fibers are scaly on their surface with no charge, providing an anti-microbial environment that bacteria cannot penetrate.
Have you ever noticed that some of your gear dries faster than others? Have you ever weighed your gear and noticed a garment with a thinner fabric weighs more than a similar garment with a thicker fabric? The amount of elastic in the garment’s fabric creates this difference. The higher percentage of Elastic (Spandex or Lycra) the heavier the fabric will weigh and the longer it will take for the fabric to dry. KUIU Ultra Merino is made with Nuyarn featuring 4 way stretch, but contains no Elastic, Lycra or Spandex.
Traditional Merino Wool twists fibers together for strength, which leaves ends poking out. Nuyarn takes the twist out, and instead lays the fibers along the same orientation as the rest of the yarn, which increases the loft because the yarn is not twisted. Nuyarn lower-density fabrics let lighter-weight garments outperform heavier traditional ring spun garments.
A new feature for the ULTRA MERINO, strategically placed body mapping with eyelet panels in temperature sensitive areas.
Flatlock stitching maximizes the comfort and function of the garment. A flatlock stitch means the two fabrics are butted together and sewn without any overlap. This prevents big, bulky seams with fabric folded underneath. Flatlock stitching helps to streamline the layering system and increase comfort.
The more aerobic the activity is, the wider the eyelets expand which increases the airflow.

KUIU’s quest for the finest ingredients led us to Nuyarn by the Merino Company in New Zealand, where they take their wool remarkably seriously. Nuyarn is not a new fabric, it’s a new way of making fabric. Traditional ring spun yarn twists the life out of yarn. Nuyarn doesn’t.


Classic yarns twist fibers together for strength, which leaves ends poking out. Nuyarn takes the twist out, and instead lays fibers along the same orientation as the rest of the yarn, so fabrics feel less prickly and more comfortable yet become stronger. The unique yarn orientation creates more loft while significantly reducing weight. Nuyarn lower-density fabrics let lighter-weight garments outperform heavier traditional ring spun garments.


KUIU’s ULTRA Merino 125 ultra-lightweight shirt is the perfect blend of wool and nylon providing yet another option for the highly active hunter. Cooling and wicking moisture when it’s hot or providing insulation when it’s cold, the 125 is an ideal choice for hunters needing an all-around solution.

We recommend only Superfine Merino for next to skin. Superfine Merino 15 –18.5 micron has no itch, is very soft and comfortable. Microns are the unit of measurement used to express a wool fibers diameter. The lower the micron of a fiber the finer it is. The finer the wool, the softer it is next to skin.

Through extensive research we found that 17.5 micron is the best balance of next to skin comfort and durability. Unlike coarser micron wools, Superfine Merino fibers bend with pressure against the skin, flexing so as not to agitate the nerves, which creates the itchy feeling people often experience with wool products.
Classic yarns twist fibers together for strength, which leaves ends poking out. Nuyarn takes the twist out, and instead lays fibers along the same orientation as the rest of the yarn, so fabrics feel less prickly and more comfortable yet become stronger. The unique yarn orientation creates more loft while significantly reducing weight. Nuyarn lower-density fabrics let lighter-weight garments outperform heavier traditional ring spun garments.
Nuyarn uses a Wool Nylon blend to increase loft, stretch, dry times, warmth and strength.
Our lightest base layer for warmest-weather hunts on its own, or the next-to-skin layer on colder hunts.
The breathability, or the ability to dissipate perspiration, of Merino fabrics brings about temperature changes where two things can happen:

1) When there is a rise in humidity in the microclimate between the skin and the merino fabric, moisture vapor is absorbed then transported and released into the air outside of the fabric, keeping you dry, reducing clamminess, and creating a noticeable drop in temperature for the wearer.

2) Conversely, if the ambient temperature should drop, air is trapped between the fibers and creates an insulating effect. Moisture from your body (sweat) can be absorbed by Merino and converted to a bound liquid then moved to the exterior of the garment to evaporate, a process that produces a rise in temperature known as ‘heat of sorption’.
When there is a rise in humidity in the microclimate between the skin and the merino fabric, moisture vapor is absorbed then transported and released into the air outside of the fabric, keeping you dry, reducing clamminess, and creating a noticeable drop in temperature for the wearer. This evaporation speeds the dry time of the material as well as keeping you cool.
Merino is naturally odor reducing due to its physical and chemical structure. Merino has the ability to absorb and transport moisture (sweat) away from the skin where it evaporates into the air and prevents bacteria from developing and creating unpleasant body odors. Sweat itself has no odor, but if it is allowed to remain on the skin, bacteria will develop and so will body odors. Merino fibers are scaly on their surface with no charge, providing an anti-microbial environment that bacteria cannot penetrate.
Have you ever noticed that some of your gear dries faster than others? Have you ever weighed your gear and noticed a garment with a thinner fabric weighs more than a similar garment with a thicker fabric? The amount of elastic in the garment’s fabric creates this difference. The higher percentage of Elastic (Spandex or Lycra) the heavier the fabric will weigh and the longer it will take for the fabric to dry. KUIU Ultra Merino is made with Nuyarn featuring 4 way stretch, but contains no Elastic, Lycra or Spandex.
Traditional Merino Wool twists fibers together for strength, which leaves ends poking out. Nuyarn takes the twist out, and instead lays the fibers along the same orientation as the rest of the yarn, which increases the loft because the yarn is not twisted. Nuyarn lower-density fabrics let lighter-weight garments outperform heavier traditional ring spun garments.
A new feature for the ULTRA MERINO, strategically placed body mapping with eyelet panels in temperature sensitive areas.
Flatlock stitching maximizes the comfort and function of the garment. A flatlock stitch means the two fabrics are butted together and sewn without any overlap. This prevents big, bulky seams with fabric folded underneath. Flatlock stitching helps to streamline the layering system and increase comfort.
The more aerobic the activity is, the wider the eyelets expand which increases the airflow.
KUIU’s quest for the finest ingredients led us to Nuyarn by the Merino Company in New Zealand, where they take their wool remarkably seriously. Nuyarn is not a new fabric, it’s a new way of making fabric. Traditional ring spun yarn twists the life out of yarn. Nuyarn doesn’t.

Classic yarns twist fibers together for strength, which leaves ends poking out. Nuyarn takes the twist out, and instead lays fibers along the same orientation as the rest of the yarn, so fabrics feel less prickly and more comfortable yet become stronger. The unique yarn orientation creates more loft while significantly reducing weight. Nuyarn lower-density fabrics let lighter-weight garments outperform heavier traditional ring spun garments.

KUIU’s ULTRA Merino 145 lightweight collection is an incredibly comfortable blend of wool and nylon providing a next to skin or layered option for the highly active hunter. Naturally anti-microbial, moisture wicking and thermo regulating, the 145 is an ideal choice for hunters needing a long term effective solution in a wide range of aerobic conditions and temperatures.
We recommend only Superfine Merino for next to skin. Superfine Merino 15 –18.5 micron has no itch, is very soft and comfortable. Microns are the unit of measurement used to express a wool fibers diameter. The lower the micron of a fiber the finer it is. The finer the wool, the softer it is next to skin.

Through extensive research we found that 17.5 micron is the best balance of next to skin comfort and durability. Unlike coarser micron wools, Superfine Merino fibers bend with pressure against the skin, flexing so as not to agitate the nerves, which creates the itchy feeling people often experience with wool products.
Classic yarns twist fibers together for strength, which leaves ends poking out. Nuyarn takes the twist out, and instead lays fibers along the same orientation as the rest of the yarn, so fabrics feel less prickly and more comfortable yet become stronger. The unique yarn orientation creates more loft while significantly reducing weight. Nuyarn lower-density fabrics let lighter-weight garments outperform heavier traditional ring spun garments.
Nuyarn uses a Wool Nylon blend to increase loft, stretch, dry times, warmth and strength.
Cooling and wicking moisture when it’s hot or insulating when it’s cold, for an ideal all around solution. The one to own if you’re going to own only one.
The breathability, or the ability to dissipate perspiration, of Merino fabrics brings about temperature changes where two things can happen:

1) When there is a rise in humidity in the microclimate between the skin and the merino fabric, moisture vapor is absorbed then transported and released into the air outside of the fabric, keeping you dry, reducing clamminess, and creating a noticeable drop in temperature for the wearer.

2) Conversely, if the ambient temperature should drop, air is trapped between the fibers and creates an insulating effect. Moisture from your body (sweat) can be absorbed by Merino and converted to a bound liquid then moved to the exterior of the garment to evaporate, a process that produces a rise in temperature known as ‘heat of sorption’.
When there is a rise in humidity in the microclimate between the skin and the merino fabric, moisture vapor is absorbed then transported and released into the air outside of the fabric, keeping you dry, reducing clamminess, and creating a noticeable drop in temperature for the wearer. This evaporation speeds the dry time of the material as well as keeping you cool.
Merino is naturally odor reducing due to its physical and chemical structure. Merino has the ability to absorb and transport moisture (sweat) away from the skin where it evaporates into the air and prevents bacteria from developing and creating unpleasant body odors. Sweat itself has no odor, but if it is allowed to remain on the skin, bacteria will develop and so will body odors. Merino fibers are scaly on their surface with no charge, providing an anti-microbial environment that bacteria cannot penetrate.
Have you ever noticed that some of your gear dries faster than others? Have you ever weighed your gear and noticed a garment with a thinner fabric weighs more than a similar garment with a thicker fabric? The amount of elastic in the garment’s fabric creates this difference. The higher percentage of Elastic (Spandex or Lycra) the heavier the fabric will weigh and the longer it will take for the fabric to dry. KUIU Ultra Merino is made with Nuyarn featuring 4 way stretch, but contains no Elastic, Lycra or Spandex.
Traditional Merino Wool twists fibers together for strength, which leaves ends poking out. Nuyarn takes the twist out, and instead lays the fibers along the same orientation as the rest of the yarn, which increases the loft because the yarn is not twisted. Nuyarn lower-density fabrics let lighter-weight garments outperform heavier traditional ring spun garments.
A new feature for the ULTRA MERINO, strategically placed body mapping with eyelet panels in temperature sensitive areas.
Flatlock stitching maximizes the comfort and function of the garment. A flatlock stitch means the two fabrics are butted together and sewn without any overlap. This prevents big, bulky seams with fabric folded underneath. Flatlock stitching helps to streamline the layering system and increase comfort.
The more aerobic the activity is, the wider the eyelets expand which increases the airflow.
ULTRA Merino 145 Zip-T
Our Price: $79.99
KUIU’s quest for the finest ingredients led us to Nuyarn by the Merino Company in New Zealand, where they take their wool remarkably seriously. Nuyarn is not a new fabric, it’s a new way of making fabric. Traditional ring spun yarn twists the life out of yarn. Nuyarn doesn’t.

Classic yarns twist fibers together for strength, which leaves ends poking out. Nuyarn takes the twist out, and instead lays fibers along the same orientation as the rest of the yarn, so fabrics feel less prickly and more comfortable yet become stronger. The unique yarn orientation creates more loft while significantly reducing weight. Nuyarn lower-density fabrics let lighter-weight garments outperform heavier traditional ring spun garments.

KUIU’s ULTRA Mernio 145 lightweight collection is an incredibly comfortable blend of wool and nylon providing a next to skin or layered option for the highly active hunter. Naturally anti-microbial, moisture wicking and thermo regulating, the 145 is an ideal choice for hunters needing a long term effective solution in a wide range of aerobic conditions and temperatures.
We recommend only Superfine Merino for next to skin. Superfine Merino 15 –18.5 micron has no itch, is very soft and comfortable. Microns are the unit of measurement used to express a wool fibers diameter. The lower the micron of a fiber the finer it is. The finer the wool, the softer it is next to skin.

Through extensive research we found that 17.5 micron is the best balance of next to skin comfort and durability. Unlike coarser micron wools, Superfine Merino fibers bend with pressure against the skin, flexing so as not to agitate the nerves, which creates the itchy feeling people often experience with wool products.
Classic yarns twist fibers together for strength, which leaves ends poking out. Nuyarn takes the twist out, and instead lays fibers along the same orientation as the rest of the yarn, so fabrics feel less prickly and more comfortable yet become stronger. The unique yarn orientation creates more loft while significantly reducing weight. Nuyarn lower-density fabrics let lighter-weight garments outperform heavier traditional ring spun garments.
Nuyarn uses a Wool Nylon blend to increase loft, stretch, dry times, warmth and strength.
Cooling and wicking moisture when it’s hot or insulating when it’s cold, for an ideal all around solution. The one to own if you’re going to own only one.
The breathability, or the ability to dissipate perspiration, of Merino fabrics brings about temperature changes where two things can happen:

1) When there is a rise in humidity in the microclimate between the skin and the merino fabric, moisture vapor is absorbed then transported and released into the air outside of the fabric, keeping you dry, reducing clamminess, and creating a noticeable drop in temperature for the wearer.

2) Conversely, if the ambient temperature should drop, air is trapped between the fibers and creates an insulating effect. Moisture from your body (sweat) can be absorbed by Merino and converted to a bound liquid then moved to the exterior of the garment to evaporate, a process that produces a rise in temperature known as ‘heat of sorption’.
When there is a rise in humidity in the microclimate between the skin and the merino fabric, moisture vapor is absorbed then transported and released into the air outside of the fabric, keeping you dry, reducing clamminess, and creating a noticeable drop in temperature for the wearer. This evaporation speeds the dry time of the material as well as keeping you cool.
Merino is naturally odor reducing due to its physical and chemical structure. Merino has the ability to absorb and transport moisture (sweat) away from the skin where it evaporates into the air and prevents bacteria from developing and creating unpleasant body odors. Sweat itself has no odor, but if it is allowed to remain on the skin, bacteria will develop and so will body odors. Merino fibers are scaly on their surface with no charge, providing an anti-microbial environment that bacteria cannot penetrate.
Have you ever noticed that some of your gear dries faster than others? Have you ever weighed your gear and noticed a garment with a thinner fabric weighs more than a similar garment with a thicker fabric? The amount of elastic in the garment’s fabric creates this difference. The higher percentage of Elastic (Spandex or Lycra) the heavier the fabric will weigh and the longer it will take for the fabric to dry. KUIU Ultra Merino is made with Nuyarn featuring 4 way stretch, but contains no Elastic, Lycra or Spandex.
Traditional Merino Wool twists fibers together for strength, which leaves ends poking out. Nuyarn takes the twist out, and instead lays the fibers along the same orientation as the rest of the yarn, which increases the loft because the yarn is not twisted. Nuyarn lower-density fabrics let lighter-weight garments outperform heavier traditional ring spun garments.
A new feature for the ULTRA MERINO, strategically placed body mapping with eyelet panels in temperature sensitive areas.
Flatlock stitching maximizes the comfort and function of the garment. A flatlock stitch means the two fabrics are butted together and sewn without any overlap. This prevents big, bulky seams with fabric folded underneath. Flatlock stitching helps to streamline the layering system and increase comfort.
The more aerobic the activity is, the wider the eyelets expand which increases the airflow.
New Feature: The ULTRA MERINO BOTTOM now features full leg zippers. This allows you to easily manage your layering system. With your boots and existing layers on, you can put on or off your base layer bottoms.
We shortened the inseam of the new ULTRA MERINO BOTTOM to end near the top of your boots. This prevents excess material from building up inside of your boots, which can lead to discomfort during extended hikes in the mountains.
KUIU’s quest for the finest ingredients led us to Nuyarn by the Merino Company in New Zealand, where they take their wool remarkably seriously. Nuyarn is not a new fabric, it’s a new way of making fabric. Traditional ring spun yarn twists the life out of yarn. Nuyarn doesn’t.

Classic yarns twist fibers together for strength, which leaves ends poking out. Nuyarn takes the twist out, and instead lays fibers along the same orientation as the rest of the yarn, so fabrics feel less prickly and more comfortable yet become stronger. The unique yarn orientation creates more loft while significantly reducing weight. Nuyarn lower-density fabrics let lighter-weight garments outperform heavier traditional ring spun garments.

KUIU’s ULTRA Mernio 145 lightweight collection is an incredibly comfortable blend of wool and nylon providing a next to skin or layered option for the highly active hunter. Naturally anti-microbial, moisture wicking and thermo regulating, the 145 is an ideal choice for hunters needing a long term effective solution in a wide range of aerobic conditions and temperatures.
We recommend only Superfine Merino for next to skin. Superfine Merino 15 –18.5 micron has no itch, is very soft and comfortable. Microns are the unit of measurement used to express a wool fibers diameter. The lower the micron of a fiber the finer it is. The finer the wool, the softer it is next to skin.

Through extensive research we found that 17.5 micron is the best balance of next to skin comfort and durability. Unlike coarser micron wools, Superfine Merino fibers bend with pressure against the skin, flexing so as not to agitate the nerves, which creates the itchy feeling people often experience with wool products.
Classic yarns twist fibers together for strength, which leaves ends poking out. Nuyarn takes the twist out, and instead lays fibers along the same orientation as the rest of the yarn, so fabrics feel less prickly and more comfortable yet become stronger. The unique yarn orientation creates more loft while significantly reducing weight. Nuyarn lower-density fabrics let lighter-weight garments outperform heavier traditional ring spun garments.
Nuyarn uses a Wool Nylon blend to increase loft, stretch, dry times, warmth and strength.
Cooling and wicking moisture when it’s hot or insulating when it’s cold, for an ideal all around solution. The one to own if you’re going to own only one.
The breathability, or the ability to dissipate perspiration, of Merino fabrics brings about temperature changes where two things can happen:

1) When there is a rise in humidity in the microclimate between the skin and the merino fabric, moisture vapor is absorbed then transported and released into the air outside of the fabric, keeping you dry, reducing clamminess, and creating a noticeable drop in temperature for the wearer.

2) Conversely, if the ambient temperature should drop, air is trapped between the fibers and creates an insulating effect. Moisture from your body (sweat) can be absorbed by Merino and converted to a bound liquid then moved to the exterior of the garment to evaporate, a process that produces a rise in temperature known as ‘heat of sorption’.
When there is a rise in humidity in the microclimate between the skin and the merino fabric, moisture vapor is absorbed then transported and released into the air outside of the fabric, keeping you dry, reducing clamminess, and creating a noticeable drop in temperature for the wearer. This evaporation speeds the dry time of the material as well as keeping you cool.
Merino is naturally odor reducing due to its physical and chemical structure. Merino has the ability to absorb and transport moisture (sweat) away from the skin where it evaporates into the air and prevents bacteria from developing and creating unpleasant body odors. Sweat itself has no odor, but if it is allowed to remain on the skin, bacteria will develop and so will body odors. Merino fibers are scaly on their surface with no charge, providing an anti-microbial environment that bacteria cannot penetrate.
Have you ever noticed that some of your gear dries faster than others? Have you ever weighed your gear and noticed a garment with a thinner fabric weighs more than a similar garment with a thicker fabric? The amount of elastic in the garment’s fabric creates this difference. The higher percentage of Elastic (Spandex or Lycra) the heavier the fabric will weigh and the longer it will take for the fabric to dry. KUIU Ultra Merino is made with Nuyarn featuring 4 way stretch, but contains no Elastic, Lycra or Spandex.
Traditional Merino Wool twists fibers together for strength, which leaves ends poking out. Nuyarn takes the twist out, and instead lays the fibers along the same orientation as the rest of the yarn, which increases the loft because the yarn is not twisted. Nuyarn lower-density fabrics let lighter-weight garments outperform heavier traditional ring spun garments.
A new feature for the ULTRA MERINO, strategically placed body mapping with eyelet panels in temperature sensitive areas.
Flatlock stitching maximizes the comfort and function of the garment. A flatlock stitch means the two fabrics are butted together and sewn without any overlap. This prevents big, bulky seams with fabric folded underneath. Flatlock stitching helps to streamline the layering system and increase comfort.
The more aerobic the activity is, the wider the eyelets expand which increases the airflow.
KUIU’s quest for the finest ingredients led us to Nuyarn by the Merino Company in New Zealand, where they take their wool remarkably seriously. Nuyarn is not a new fabric, it’s a new way of making fabric. Traditional ring spun yarn twists the life out of yarn. Nuyarn doesn’t.

Classic yarns twist fibers together for strength, which leaves ends poking out. Nuyarn takes the twist out, and instead lays fibers along the same orientation as the rest of the yarn, so fabrics feel less prickly and more comfortable yet become stronger. The unique yarn orientation creates more loft while significantly reducing weight. Nuyarn lower-density fabrics let lighter-weight garments outperform heavier traditional ring spun garments.

KUIU’s ULTRA Merino 210 mid-weight base layers are a balance of warmth, weight and durability, with each piece designed to be worn over our other ULTRA Merino collections as a second layer in colder conditions or against your skin in milder weather. The unique ULTRA Merino 210 base layer fabric knits ULTRA Merino wool on the outer layer of the fabric, and polyester fabric on the inside, allowing for a soft brushed fleece against the skin while maintaining all of the natural benefits of wool.

Simply put, the ULTRA Merino 210 base layer collection has been designed to have the perfect balance of durability and comfort while remaining effective in a range of conditions and temperatures, even when worn for hours and days on end.
To combine the attributes of Merino Wool with the comfort and warmth of fleece The Merino Company developed the concept of knitting Merino Wool to a 100% Polyester brushed fleece interior. This combination of Merino Wool and Polyester creates a stable fleece that still retains the advantages of Merino Wool.

The ULTRA MERINO 210 is extremely warm and durable. The brushed fleece interior allows us to use thicker and heavier Merino Wool for added warmth and durability while still maintaining next-to-skin comfort with the brushed fleece interior.
Classic yarns twist fibers together for strength, which leaves ends poking out. Nuyarn takes the twist out, and instead lays fibers along the same orientation as the rest of the yarn, so fabrics feel less prickly and more comfortable yet become stronger. The unique yarn orientation creates more loft while significantly reducing weight. Nuyarn lower-density fabrics let lighter-weight garments outperform heavier traditional ring spun garments.
Nuyarn uses a Wool Nylon blend to increase loft, stretch, dry times, warmth and strength.
For colder hunts as a second layer or against your skin; wicks moisture and dries fast.
The breathability, or the ability to dissipate perspiration, of Merino fabrics brings about temperature changes where two things can happen:

1) When there is a rise in humidity in the microclimate between the skin and the merino fabric, moisture vapor is absorbed then transported and released into the air outside of the fabric, keeping you dry, reducing clamminess, and creating a noticeable drop in temperature for the wearer.

2) Conversely, if the ambient temperature should drop, air is trapped between the fibers and creates an insulating effect. Moisture from your body (sweat) can be absorbed by Merino and converted to a bound liquid then moved to the exterior of the garment to evaporate, a process that produces a rise in temperature known as ‘heat of sorption’.
When there is a rise in humidity in the microclimate between the skin and the merino fabric, moisture vapor is absorbed then transported and released into the air outside of the fabric, keeping you dry, reducing clamminess, and creating a noticeable drop in temperature for the wearer. This evaporation speeds the dry time of the material as well as keeping you cool.
Merino is naturally odor reducing due to its physical and chemical structure. Merino has the ability to absorb and transport moisture (sweat) away from the skin where it evaporates into the air and prevents bacteria from developing and creating unpleasant body odors. Sweat itself has no odor, but if it is allowed to remain on the skin, bacteria will develop and so will body odors. Merino fibers are scaly on their surface with no charge, providing an anti-microbial environment that bacteria cannot penetrate.
Have you ever noticed that some of your gear dries faster than others? Have you ever weighed your gear and noticed a garment with a thinner fabric weighs more than a similar garment with a thicker fabric? The amount of elastic in the garment’s fabric creates this difference. The higher percentage of Elastic (Spandex or Lycra) the heavier the fabric will weigh and the longer it will take for the fabric to dry. KUIU Ultra Merino is made with Nuyarn featuring 4 way stretch, but contains no Elastic, Lycra or Spandex.
Traditional Merino Wool twists fibers together for strength, which leaves ends poking out. Nuyarn takes the twist out, and instead lays the fibers along the same orientation as the rest of the yarn, which increases the loft because the yarn is not twisted. Nuyarn lower-density fabrics let lighter-weight garments outperform heavier traditional ring spun garments.
A new feature for the ULTRA MERINO, strategically placed body mapping with eyelet panels in temperature sensitive areas.
Flatlock stitching maximizes the comfort and function of the garment. A flatlock stitch means the two fabrics are butted together and sewn without any overlap. This prevents big, bulky seams with fabric folded underneath. Flatlock stitching helps to streamline the layering system and increase comfort.
The more aerobic the activity is, the wider the eyelets expand which increases the airflow.
New Feature: The ULTRA MERINO BOTTOM now features full leg zippers. This allows you to easily manage your layering system. With your boots and existing layers on, you can put on or off your base layer bottoms.
We shortened the inseam of the new ULTRA MERINO BOTTOM to end near the top of your boots. This prevents excess material from building up inside of your boots, which can lead to discomfort during extended hikes in the mountains.
ULTRA Merino 210 Zip-T
Our Price: $89.99
KUIU’s quest for the finest ingredients led us to Nuyarn by the Merino Company in New Zealand, where they take their wool remarkably seriously. Nuyarn is not a new fabric, it’s a new way of making fabric. Traditional ring spun yarn twists the life out of yarn. Nuyarn doesn’t.

Classic yarns twist fibers together for strength, which leaves ends poking out. Nuyarn takes the twist out, and instead lays fibers along the same orientation as the rest of the yarn, so fabrics feel less prickly and more comfortable yet become stronger. The unique yarn orientation creates more loft while significantly reducing weight. Nuyarn lower-density fabrics let lighter-weight garments outperform heavier traditional ring spun garments. KUIU’s ULTRA Mernio 210 mid-weight base layers are a balance of warmth, weight and durability, with each piece designed to be worn over our other ULTRA Merino collections as a second layer in colder conditions or against your skin in milder weather. The unique ULTRA Merino 210 base layer fabric knits ULTRA Merino wool on the outer layer of the fabric, and polyester fabric on inside, allowing for a soft brushed fleece against the skin while maintaining all of the natural benefits of wool.

Simply put, the ULTRA Merino 210 base layer collection has been designed to have the perfect balance of durability and comfort while remaining effective in a range of conditions and temperatures, even when worn for hours and days on end.
To combine the attributes of Merino Wool with the comfort and warmth of fleece The Merino Company developed the concept of knitting Merino Wool to a 100% Polyester brushed fleece interior. This combination of Merino Wool and Polyester creates a stable fleece that still retains the advantages of Merino Wool.

The ULTRA MERINO 210 is extremely warm and durable. The brushed fleece interior allows us to use thicker and heavier Merino Wool for added warmth and durability while still maintaining next-to-skin comfort with the brushed fleece interior.
Classic yarns twist fibers together for strength, which leaves ends poking out. Nuyarn takes the twist out, and instead lays fibers along the same orientation as the rest of the yarn, so fabrics feel less prickly and more comfortable yet become stronger. The unique yarn orientation creates more loft while significantly reducing weight. Nuyarn lower-density fabrics let lighter-weight garments outperform heavier traditional ring spun garments.
Nuyarn uses a Wool Nylon blend to increase loft, stretch, dry times, warmth and strength.
For colder hunts as a second layer or against your skin; wicks moisture and dries fast.
The breathability, or the ability to dissipate perspiration, of Merino fabrics brings about temperature changes where two things can happen:

1) When there is a rise in humidity in the microclimate between the skin and the merino fabric, moisture vapor is absorbed then transported and released into the air outside of the fabric, keeping you dry, reducing clamminess, and creating a noticeable drop in temperature for the wearer.

2) Conversely, if the ambient temperature should drop, air is trapped between the fibers and creates an insulating effect. Moisture from your body (sweat) can be absorbed by Merino and converted to a bound liquid then moved to the exterior of the garment to evaporate, a process that produces a rise in temperature known as ‘heat of sorption’.
When there is a rise in humidity in the microclimate between the skin and the merino fabric, moisture vapor is absorbed then transported and released into the air outside of the fabric, keeping you dry, reducing clamminess, and creating a noticeable drop in temperature for the wearer. This evaporation speeds the dry time of the material as well as keeping you cool.
Merino is naturally odor reducing due to its physical and chemical structure. Merino has the ability to absorb and transport moisture (sweat) away from the skin where it evaporates into the air and prevents bacteria from developing and creating unpleasant body odors. Sweat itself has no odor, but if it is allowed to remain on the skin, bacteria will develop and so will body odors. Merino fibers are scaly on their surface with no charge, providing an anti-microbial environment that bacteria cannot penetrate.
Have you ever noticed that some of your gear dries faster than others? Have you ever weighed your gear and noticed a garment with a thinner fabric weighs more than a similar garment with a thicker fabric? The amount of elastic in the garment’s fabric creates this difference. The higher percentage of Elastic (Spandex or Lycra) the heavier the fabric will weigh and the longer it will take for the fabric to dry. KUIU Ultra Merino is made with Nuyarn featuring 4 way stretch, but contains no Elastic, Lycra or Spandex.
Traditional Merino Wool twists fibers together for strength, which leaves ends poking out. Nuyarn takes the twist out, and instead lays the fibers along the same orientation as the rest of the yarn, which increases the loft because the yarn is not twisted. Nuyarn lower-density fabrics let lighter-weight garments outperform heavier traditional ring spun garments.
A new feature for the ULTRA MERINO, strategically placed body mapping with eyelet panels in temperature sensitive areas.
Flatlock stitching maximizes the comfort and function of the garment. A flatlock stitch means the two fabrics are butted together and sewn without any overlap. This prevents big, bulky seams with fabric folded underneath. Flatlock stitching helps to streamline the layering system and increase comfort.
The more aerobic the activity is, the wider the eyelets expand which increases the airflow.