Base Layer - Tops

Over forty years ago Terramar was the first company to introduce pure silk performance base layer products. Today, Thermasilk is still the standard...

Buy the Wool Thermo LS w/Inlay locally.

Protective, quick-wicking, and lightweight, this comfortable long-sleeve, half-zip tee is perfect for mountain running and fast hiking.

The first layer you'll reach for every morning of winter. This thin fleece hoody is built for mountain ascents in cold conditions, wicking sweat qu...

Need a shirt that's nice yet casual? Sharp yet comfortable? Our Men's Printed Short Sleeve Button Down can tick all the boxes. With the uncontested...

An all-season favorite, the Women's Classic All-Season Merino Base Layer Long Sleeve can be sported as a base layer in the fall or summer when it's...

Our popular Classic All-Season Merino Base Layer 1/4 Zip is the perfect base layer for warm or cold weather. This top uses our All-Season-weight Me...

Soft and durable, our Stance Mountain short-sleeve tee comes with a Rab logo chest print and is built with premium organic cotton.

The Stance 3 Peaks SS Tee is an organic cotton jersey t-shirt, with a Rab vintage print. Comfortable and easy to wear, the Stance Tee has a regular...

The Force hoody is made with fast-drying Motiv fabric with UPF protection. Lightweight and breathable, it's ideal for cool mornings or covering up ...

Buy the Super Thermo C-Shirt locally.

The Below Zero Crew is the perfect piece to keep you warm. The extra durable four way stretch provides support and ease of movement in all directio...

The Cloud Nine Performance Scoop is the ideal piece for all day warmth and comfort while being out in the elements. This versatile piece features a...

The Below Zero Half-Zip Top is the perfect piece to keep you warm. The extra durable four way stretch provides support and ease of movement in all ...

The Cloud Nine Scoop Neck Top is the ideal piece for all day warmth and comfort while being out in the elements. This versatile piece features an u...

Meet the new and improved Women's Merino 250 Base Layer Crew. We've updated this 100% Merino wool fan-favorite with new color options and an enhanc...

Our most versatile baselayer: warm, breathable, quick-drying and with HeiQ Fresh durable odor control for daily use. The Capilene Midweight Crew hi...

With its innovative, seamless, 3-D knit structure, our Capilene Air Hoody offers amazing warmth and comfort range. An airy blend of 51% responsibly...

Buy the Super Thermo SS Tee locally.

With its innovative, seamless, 3-D knit structure, our Capilene Air Crew offers amazing warmth and comfort range. An airy blend of 51% responsibly ...

Our most versatile baselayer: warm, breathable, quick-drying and with HeiQ Fresh durable odor control for daily use. The Capilene Midweight Crew hi...

Our most versatile baselayer: warm, breathable, quick-drying and with HeiQ Fresh durable odor control for daily use. The Capilene Midweight Zip-Nec...

Capilene Air is the most advanced baselayer we've ever made. It has the greatest range of warmth and comfort of any of our baselayers, insulates ev...

You'll love the innovation of the Intraknit Merino wool in this 1/4 zip women's baselayer, because it helps with moisture management, temperature c...