Thermal Underwear

A classic, all-around 100% recycled polyester baselayer. The smooth, soft face makes for easy layering. Hollow-core yarns and a diamond-grid back trap warm air, wick moisture and dry fast. HeiQ Pure more→odor control keeps things fresh. Fair Trade Certified sewn.

A classic, all-around 100% recycled polyester baselayer. The smooth, soft face makes for easy layering. Hollow-core yarns and a diamond-grid back trap warm air, wick moisture and dry fast. HeiQ Pure more→odor control keeps things fresh. Fair Trade Certified sewn.

The Smartwool Women's Merino 250 Baselayer Quarter Zip Shirt has an updated fit to improve functionality while also enhancing aesthetics. It is made of a soft 100% Merino wool fabric offers breathable more→warmth, moves sweat away from the body, and provides next-to-skin comfort in colder conditions. It has a crew neck and raglan sleeves for a full range of motion. It has shoulder panels, and a flatlock seam construction to help minimize chafing as well as keep you comfortable and temperature regulated as you enjoy high-intensity skiing, hiking, running, and more.

The Smartwool Women's Merino 250 Baselayer Quarter Zip Shirt has an updated fit to improve functionality while also enhancing aesthetics. It is made of a soft 100% Merino wool fabric offers breathable more→warmth, moves sweat away from the body, and provides next-to-skin comfort in colder conditions. It has a crew neck and raglan sleeves for a full range of motion. It has shoulder panels, and a flatlock seam construction to help minimize chafing as well as keep you comfortable and temperature regulated as you enjoy high-intensity skiing, hiking, running, and more.

The Smartwool Women's Merino 250 Baselayer Quarter Zip Shirt has an updated fit to improve functionality while also enhancing aesthetics. It is made of a soft 100% Merino wool fabric offers breathable more→warmth, moves sweat away from the body, and provides next-to-skin comfort in colder conditions. It has a crew neck and raglan sleeves for a full range of motion. It has shoulder panels, and a flatlock seam construction to help minimize chafing as well as keep you comfortable and temperature regulated as you enjoy high-intensity skiing, hiking, running, and more.

The Smartwool Women's Merino 250 Baselayer Quarter Zip Shirt has an updated fit to improve functionality while also enhancing aesthetics. It is made of a soft 100% Merino wool fabric offers breathable more→warmth, moves sweat away from the body, and provides next-to-skin comfort in colder conditions. It has a crew neck and raglan sleeves for a full range of motion. It has shoulder panels, and a flatlock seam construction to help minimize chafing as well as keep you comfortable and temperature regulated as you enjoy high-intensity skiing, hiking, running, and more.

The Smartwool Women's Classic Thermal Merino Base Layer Bottoms are always ready for what's ahead and what's next. With a fit updated to improve functionality while enhancing aesthetics for a range more→of body shapes and a flatlock seam construction designed to minimize chafing, comfort is never in question. Get yourself a pair or two of our best base layer pants and conquer the cold with more confidence than ever.

The Smartwool Women's Classic Thermal Merino Base Layer Bottoms are always ready for what's ahead and what's next. With a fit updated to improve functionality while enhancing aesthetics for a range more→of body shapes and a flatlock seam construction designed to minimize chafing, comfort is never in question. Get yourself a pair or two of our best base layer pants and conquer the cold with more confidence than ever.

The Smartwool Women's Classic Thermal Merino Base Layer Bottoms are always ready for what's ahead and what's next. With a fit updated to improve functionality while enhancing aesthetics for a range more→of body shapes and a flatlock seam construction designed to minimize chafing, comfort is never in question. Get yourself a pair or two of our best base layer pants and conquer the cold with more confidence than ever.

The Smartwool Men's Merino 250 Baselayer Tights have beenupdated to bring you a better fitting, more functional tight. It is made of Merino 250 a heavier, soft, 100% Merino wool fabric offers breathab more→le warmth, moves sweat away from the body, and provides next-to-skin comfort in colder conditions. Flatlock seam construction minimizes chafing. Smartwool's heaviest weight wool fabric will help keep you warm and comfortable as you ski, run, and hike the day away.

The Smartwool Men's Merino 250 Baselayer Tights have beenupdated to bring you a better fitting, more functional tight. It is made of Merino 250 a heavier, soft, 100% Merino wool fabric offers breathab more→le warmth, moves sweat away from the body, and provides next-to-skin comfort in colder conditions. Flatlock seam construction minimizes chafing. Smartwool's heaviest weight wool fabric will help keep you warm and comfortable as you ski, run, and hike the day away.

The Smartwool Women's Thermal Merino Rib Turtleneck is a game-changer and wardrobe-maker. It is made with 100% ZQ-certified Merino wool, which means it's warm, cozy, breathable, and odor-resistant. more→A back body seam wraps to the front for a body-enhancing fit and a flatlock seam construction is designed to minimize chafing. Get out and do what you love with comfort and confidence in the Smartwool Women's Thermal Merino Rib Turtleneck.

The Smartwool Women's Classic Thermal Merino Base Layer Bottoms are always ready for what's ahead and what's next. With a fit updated to improve functionality while enhancing aesthetics for a range more→of body shapes and a flatlock seam construction designed to minimize chafing, comfort is never in question. Get yourself a pair or two of our best base layer pants and conquer the cold with more confidence than ever.

The Smartwool Women's Classic Thermal Merino Base Layer Bottoms are always ready for what's ahead and what's next. With a fit updated to improve functionality while enhancing aesthetics for a range more→of body shapes and a flatlock seam construction designed to minimize chafing, comfort is never in question. Get yourself a pair or two of our best base layer pants and conquer the cold with more confidence than ever.

The Smartwool Women's Classic Thermal Merino Base Layer Bottoms are always ready for what's ahead and what's next. With a fit updated to improve functionality while enhancing aesthetics for a range more→of body shapes and a flatlock seam construction designed to minimize chafing, comfort is never in question. Get yourself a pair or two of our best base layer pants and conquer the cold with more confidence than ever.

The Smartwool Men's Merino 250 Baselayer Tights have beenupdated to bring you a better fitting, more functional tight. It is made of Merino 250 a heavier, soft, 100% Merino wool fabric offers breathab more→le warmth, moves sweat away from the body, and provides next-to-skin comfort in colder conditions. Flatlock seam construction minimizes chafing. Smartwool's heaviest weight wool fabric will help keep you warm and comfortable as you ski, run, and hike the day away.

The Smartwool Men's Merino 250 Baselayer Tights have beenupdated to bring you a better fitting, more functional tight. It is made of Merino 250 a heavier, soft, 100% Merino wool fabric offers breathab more→le warmth, moves sweat away from the body, and provides next-to-skin comfort in colder conditions. Flatlock seam construction minimizes chafing. Smartwool's heaviest weight wool fabric will help keep you warm and comfortable as you ski, run, and hike the day away.

The Smartwool Women's Classic Thermal Merino Base Layer Bottoms are always ready for what's ahead and what's next. With a fit updated to improve functionality while enhancing aesthetics for a range more→of body shapes and a flatlock seam construction designed to minimize chafing, comfort is never in question. Get yourself a pair or two of our best base layer pants and conquer the cold with more confidence than ever.

The Smartwool Women's Classic Thermal Merino Base Layer Bottoms are always ready for what's ahead and what's next. With a fit updated to improve functionality while enhancing aesthetics for a range more→of body shapes and a flatlock seam construction designed to minimize chafing, comfort is never in question. Get yourself a pair or two of our best base layer pants and conquer the cold with more confidence than ever.

The Smartwool Women's Classic Thermal Merino Base Layer Bottoms are always ready for what's ahead and what's next. With a fit updated to improve functionality while enhancing aesthetics for a range more→of body shapes and a flatlock seam construction designed to minimize chafing, comfort is never in question. Get yourself a pair or two of our best base layer pants and conquer the cold with more confidence than ever.

The Smartwool Men's Merino 250 Baselayer Tights have beenupdated to bring you a better fitting, more functional tight. It is made of Merino 250 a heavier, soft, 100% Merino wool fabric offers breathab more→le warmth, moves sweat away from the body, and provides next-to-skin comfort in colder conditions. Flatlock seam construction minimizes chafing. Smartwool's heaviest weight wool fabric will help keep you warm and comfortable as you ski, run, and hike the day away.

The Smartwool Men's Merino 250 Baselayer Tights have beenupdated to bring you a better fitting, more functional tight. It is made of Merino 250 a heavier, soft, 100% Merino wool fabric offers breathab more→le warmth, moves sweat away from the body, and provides next-to-skin comfort in colder conditions. Flatlock seam construction minimizes chafing. Smartwool's heaviest weight wool fabric will help keep you warm and comfortable as you ski, run, and hike the day away.