Underwear

Smartwool's year-round Merino 150 Base Layer Tank is up to any challenge—thanks to the body-temperature-regulating properties and breathability of Merino. With their Core Spun technology, they've wrapped Merino around a nylon core for added durability while still keeping the comfort of ultra-soft, responsibly sourced Merino next to skin. Smooth merrow stitching wraps from side to front for a feminine look. Now you're ready to conquer the day.

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.

Smartwool has updated the fit of their Women's Merino 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.

Change can be a good thing! Smartwool has improved the fit on our 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 Merino 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.

No Seams. Plenty of comfort. The Women's Seamless Bikini features seamlessly knit Merino wool for enhanced comfort next to skin and a mesh knit throughout for breathability. Your old underwear will never compare.

Great underwear is underrated. Smartwool's Women's Seamless Hipster Boxed features seamlessly knit, responsibly sourced Merino wool for unmatched comfort next to skin.

Icebreaker's lightest base layer top that’s perfect for active adventure and everyday training, the 150 Zone Long Sleeve Crewe features 150gm jersey corespun with LYCRA® to maximize flexibility. The merino mesh has been strategically place for increased ventilation.

Icebreaker's lightest base layer top that’s perfect for active adventure and everyday training, the 150 Zone Long Sleeve Crewe features 150gm jersey corespun with LYCRA® to maximize flexibility. The merino mesh has been strategically place for increased ventilation.

A versatile women’s merino wool go-anywhere base layer shirt made from breathable 100% merino wool jersey, the 200 Oasis Long Sleeve Crewe is our best-selling base layer top. The merino fibers help regulate your body temperature in all weather conditions and resists odors.

Icebreaker's best-selling base layer bottoms made from soft and breathable 100% merino wool jersey, the 200 Oasis Leggings are the perfect foundation for your cold-weather layering. With the soft merino fibers, they will help regulate the body's temperature, no matter weather conditions while also resisting odors.

Icebreaker's best-selling base layer bottoms made from soft and breathable 100% merino wool jersey, the 200 Oasis Leggings are the perfect foundation for your cold-weather layering. With the soft merino fibers, they will help regulate the body's temperature, no matter weather conditions while also resisting odors.

A versatile women’s merino wool base layer shirt with a zip-neck design for added ventilation and breathability, the 200 Oasis Long Sleeve Half Zip combines casual comfort with technical performance. Icebreaker Oasis base layers are what the company is famous for. These best-sellers are designed to contour the body and will easily flex with you, allowing maximum movement, whatever the activity. Not too heavy, not too light, our Oasis is made from 100% merino midweight jersey, making them your go to base layers for year-round layering and everyday comfort.

Their versatile, go-anywhere shirt made from breathable 100% merino wool jersey, the 200 Oasis Long Sleeve Crewe Ski Stripes is their best-selling base layer top. The original graphic artwork by Damon Watters features a classic alpine powder run.

Their versatile, go-anywhere shirt made from breathable 100% merino wool jersey, the 200 Oasis Long Sleeve Crewe Ski Tracks is their best-selling base layer top.

An incredibly warm merino base layer with a unique jacquard pattern, the 250 Vertex Long Sleeve Crewe Alpine Geo is a go-to piece for winter layering—ideal for skiing, snowshoeing and other cold-weather pursuits. The all-over graphic print draws inspiration from the fractal structure of a snowflake.

An incredibly warm merino base layer with a unique jacquard pattern, the 250 Vertex Long Sleeve Half Zip Alpine Geo is a go-to piece for winter layering—ideal for skiing, snowshoeing and other cold-weather pursuits. The all-over graphic print draws inspiration from the fractal structure of a snowflake.

Incredibly warm merino base layer bottoms with a unique jacquard pattern, the 250 Vertex Leggings Fractured Landscapes are a go-to piece for winter layering—ideal for skiing, snowshoeing and other cold-weather pursuits. The original jacquard-inspired print artwork by Nathan Dunn draws inspiration from the natural cracks and angular shapes found in rock formations.

An incredibly warm merino base layer with a unique jacquard pattern, the 250 Vertex Long Sleeve Crewe Fractured Landscapes is a go-to piece for winter layering—ideal for skiing, snowshoeing and other cold-weather pursuits. The original jacquard-inspired print artwork by Nathan Dunn draws inspiration from the natural cracks and angular shapes found in rock formations.

An incredibly warm merino base layer with a unique jacquard pattern, the 250 Vertex Long Sleeve Half Zip Sedimentary is a go-to piece for winter layering—ideal for skiing, snowshoeing and other cold-weather pursuits. The all-over graphic print draws inspiration from the geologic layers of the world's mountains.

Midweight base layer bottoms perfect for skiing, winter hiking, or cold-weather layering, the 260 Tech Leggings are a warmer version of the best-selling Oasis Leggings, made with 100% merino wool.

A warmer, midweight version of their best-selling Oasis, the 260 Tech Long Sleeve Half Zip is a go-to piece for winter layering, made with 100% merino wool. With the soft merino fibers, they will help regulate the body's temperature, no matter weather conditions while also resisting odors.

Technical, cold-weather base layer bottoms for highly aerobic days, the 260 Zone Leggings feature zoned ventilation panels for active temperature regulation and ample breathability.

Icebreaker's technical, cold-weather base layer top for highly aerobic days, the 260 Zone Long Sleeve Half Zip features zoned ventilation panels for active temperature regulation and ample breathability.

Lightweight women’s merino wool base layer bottoms with strategically placed mesh panels for active ventilation, the 200 Zone Leggings are perfect for year-round use.

Soft and stretchy merino wool underwear with a modern slim fit, the Siren Bikini features Icebreaker's corespun fabric that’s incredibly soft and durable. With the soft merino fibers, they will help regulate the body's temperature, no matter weather conditions while also resisting odors.

A sleek, modern-fit bra with our soft and stretchy corespun merino wool fabric, the Siren Bra is comfortable, supportive and breathable. The durable merino blend provide assistance regulating your body temperature in all weather conditions.

An ultra-comfy underwear bottom for everyday wear, the Siren Hipkini features ultra-lightweight corespun merino blend fabric that’s durable, stretchy and incredibly soft. The durable merino blend provide assistance regulating your body temperature in all weather conditions. Because it was made in the mountains rather than in a petrochemical laboratory. Merino wool fibre is naturally renewable, recyclable and biodegradable.

A soft and stretchy tank top with a sleek, feminine design for everyday layering comfort, the Siren Tank features our durable and incredibly soft corespun merino wool blend fabric.

A soft and stretchy tank top with a sleek, feminine design for everyday layering comfort, the Siren Tank features our durable and incredibly soft corespun merino wool blend fabric.