Underwear

Change can be a good thing! Smartwool has improved the fit on their 100% Merino bottom with new side seams and a curved seam in the back that provides a slimming effect, while reducing sag and excess fabric. Their Women's 250 Baselayer Bottoms are designed to keep you doing what you love while staying comfortable, helping with temperature regulation and wrapping you in unbelievable softness.

Smartwool has updated the fit of their Women's 250 Base Layer 1/4 Zip to improve functionality while also enhancing aesthetics. As one of their heaviest base layer tops and best base layers for cold weather, this garment uses 100% responsibly sourced Merino wool, 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.

Smartwool has updated the fit of their Women's 250 Base Layer 1/4 Zip to improve functionality while also enhancing aesthetics. As one of their heaviest base layer tops and best base layers for cold weather, this garment uses 100% responsibly sourced Merino wool, 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.

Smartwool has updated the fit of their Women's 250 Base Layer 1/4 Zip to improve functionality while also enhancing aesthetics. As one of their heaviest base layer tops and best base layers for cold weather, this garment uses 100% responsibly sourced Merino wool, 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.

Meet the new and improved Women's Merino 250 Base Layer Crew. Smartwool updated this 100% Merino wool fan favorite with new color options and an enhanced fit to improve functionality while elevating aesthetics. The addition of shoulder panels and its flatlock seam construction help prevent chafing and increase your comfort level. Add one of their best base layers for cold weather to your winter wardrobe and experience the difference the next time you go skiing, hiking, climbing, or biking.

Meet the new and improved Women's Merino 250 Base Layer Crew. Smartwool updated this 100% Merino wool fan favorite with new color options and an enhanced fit to improve functionality while elevating aesthetics. The addition of shoulder panels and its flatlock seam construction help prevent chafing and increase your comfort level. Add one of their best base layers for cold weather to your winter wardrobe and experience the difference the next time you go skiing, hiking, climbing, or biking.

Meet the new and improved Women's Merino 250 Base Layer Crew. Smartwool updated this 100% Merino wool fan favorite with new color options and an enhanced fit to improve functionality while elevating aesthetics. The addition of shoulder panels and its flatlock seam construction help prevent chafing and increase your comfort level. Add one of their best base layers for cold weather to your winter wardrobe and experience the difference the next time you go skiing, hiking, climbing, or biking.

Meet the new and improved Women's Merino 250 Base Layer Crew. Smartwool updated this 100% Merino wool fan favorite with new color options and an enhanced fit to improve functionality while elevating aesthetics. The addition of shoulder panels and its flatlock seam construction help prevent chafing and increase your comfort level. Add one of their best base layers for cold weather to your winter wardrobe and experience the difference the next time you go skiing, hiking, climbing, or biking.

Meet the new and improved Women's Merino 250 Base Layer Crew. Smartwool updated this 100% Merino wool fan favorite with new color options and an enhanced fit to improve functionality while elevating aesthetics. The addition of shoulder panels and its flatlock seam construction help prevent chafing and increase your comfort level. Add one of their best base layers for cold weather to your winter wardrobe and experience the difference the next time you go skiing, hiking, climbing, or biking.

Meet the new and improved Women's Merino 250 Base Layer Crew. Smartwool updated this 100% Merino wool fan favorite with new color options and an enhanced fit to improve functionality while elevating aesthetics. The addition of shoulder panels and its flatlock seam construction help prevent chafing and increase your comfort level. Add one of their best base layers for cold weather to your winter wardrobe and experience the difference the next time you go skiing, hiking, climbing, or biking.

Meet the new and improved Women's Merino 250 Base Layer Crew. Smartwool updated this 100% Merino wool fan favorite with new color options and an enhanced fit to improve functionality while elevating aesthetics. The addition of shoulder panels and its flatlock seam construction help prevent chafing and increase your comfort level. Add one of their best base layers for cold weather to your winter wardrobe and experience the difference the next time you go skiing, hiking, climbing, or biking.

Meet the new and improved Women's Merino 250 Base Layer Crew. Smartwool updated this 100% Merino wool fan favorite with new color options and an enhanced fit to improve functionality while elevating aesthetics. The addition of shoulder panels and its flatlock seam construction help prevent chafing and increase your comfort level. Add one of their best base layers for cold weather to your winter wardrobe and experience the difference the next time you go skiing, hiking, climbing, or biking.

Meet the new and improved Women's Merino 250 Base Layer Crew. Smartwool updated this 100% Merino wool fan favorite with new color options and an enhanced fit to improve functionality while elevating aesthetics. The addition of shoulder panels and its flatlock seam construction help prevent chafing and increase your comfort level. Add one of their best base layers for cold weather to your winter wardrobe and experience the difference the next time you go skiing, hiking, climbing, or biking.

When you're looking for the comfort and benefits of Merino without adding extra fabric in your ski boots, the Women's Classic Thermal Merino Base Layer 3/4 Bottom is the perfect solution. In these base layer pants, 100% Merino wool provides breathability and comfort, while an enhanced fit helps reduce excess fabric so you can layer easily and love your adventures.

The Women's Intraknit Bikini Boxed by Smartwool is a definite when going out for a run. Ergonomically mapped to the body, they're built to be incredibly breathable and airy in all the right places. Made with merino wool, which has natural moisture wicking properties and is also odor preventive. They are also are flat and borderline seamless for maximum comfort. The perfect underwear for all your training needs!

Smartwool's Women's Intraknit Hipster underwear are all about helping you feel your best. They are seamless knit and put responsibly sourced Merino next to skin for enhanced comfort, moisture management, and temperature regulation. They are perfect for everything from racking up miles to relaxing in the unmatched comfort of Merino.

Know how, with some bras, the first thing you want to do when you get home is take it off? Well, here’s a bra you’ll love having on. With the softness and moisture management of Merino wool next to your skin, Smartwool's Women’s Intraknit™ Racerback Bra also offers an outer layer designed for support, shape, and lift. Plus, its racerback style offers even weight distribution without the shoulder dig. With so many reasons to love, this bra can complement most any low-impact activity—and leave you feeling comfortable all day.

Everyone deserves a bra that supports while also adding comfort. That’s where Smartwool's Women’s Intraknit™ Strappy Bra can help. Cut to follow the contours of your body, it combines next-to-skin Merino wool comfort with external shape and lift. If you’re looking for all-day comfort and support, your search ends here.

Smartwool's Intraknit™ fabric is 3D-knit with Merino Sport yarns to be lighter weight with a cleaner finish. This women’s wool baselayer is perfect for a day of outdoor activity in cool to warm weather, because it will help keep your body dry and comfortable, and its fit won’t slow you down. For all your hiking, jogging, or other athletic adventures, this top will be there for you.

Built to fit, flex, and follow you like a shadow, our Women's Intraknit™ Thermal Merino Base Layer Bottom uses our innovative 3D knitting technology to create our most insulated, ventilated, and flexible base layer bottoms ever. These women's wool pants feature Merino Sport yarn to offer the power of Merino paired with the durability and fast dry times of polyester — perfect for skiing, running, and all your high-intensity training.

This minimalist-style crew is anything but insignificant. The Women's Intraknit™ Thermal Merino Base Layer Crew is a lightweight, super-moveable top, made for all of your most extreme cold-weather activities. With Merino Sport yarns and gender-specific ventilation perfectly placed to maximize thermoregulation and breathability in high-intensity activities, it helps amplify moisture management, movement, and comfort. When you're in our best base layers, you're ready for anything.

The Women's Intraknit™ Merino Thermal Leggings are here to elevate all your high-intensity activities. Made with Intraknit™ technology for enhanced insulation and ventilation to amplify movement and featuring a flattering high-rise waist, you'll never want to break a sweat in another legging again.

Patagonia's most popular briefs are lightweight, seamless and made of stretchy fabric with miDori™ bioSoft for added wicking and softness, and HeiQ® Pure odor control. Fair Trade Certified™ sewn.

Patagonia's favorite all-purpose, seamless bra hugs the body, supports a variety of sizes and is made of synthetic fabric with miDori™ bioSoft for added wicking and softness, and HeiQ® Pure odor control. Fair Trade Certified™ sewn.

This comfortable racerback bra is made of a soft, quick-drying nylon (67% recycled)/spandex. HeiQ® Fresh durable odor control. Fair Trade Certified™ sewn. The Barely Bra provides breathable, all-day comfort with slender, no-dig straps that meet into a flattering, comfortable racerback. An underbust panel offers support for B/C cups. Feminine details like the center gather for shaping and a double fabric front for modesty are nice extra touches.

Made of 89% nylon (48% recycled)/11% spandex with HeiQ® Pure odor control, these seamless hipster underwear dry quickly and stay put. 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 odor control keeps things fresh. Fair Trade Certified™ sewn.

A classic, all-around polyester baselayer with 100% recycled content. 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® Fresh durable odor control keeps things fresh. Fair Trade Certified™ sewn.

A classic, all-around polyester baselayer with 100% recycled content. 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® Fresh durable odor control keeps things fresh. Fair Trade Certified™ sewn.

A classic, all-around polyester baselayer with 100% recycled content. 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® Fresh durable odor control keeps things fresh. Fair Trade Certified™ sewn.