Base Layers, Underwear & Socks

Merino 10 Below OTC

hiking and cold-weather footwear

Women's Classic Thermal Merino Base Layer Bottom

Designed for comfort in the cold, this midweight base layer bottom is perfect for layering in colder conditions.

18-Hour Jersey Boxer Brief

multi-day outdoor travel

Sender Boxer Brief 6-Inch

multi-day outdoor travel

Intraknit Boxer Brief

multi-day outdoor travel

Hiker Micro Crew Cushion

hiking and cold-weather footwear

Mountaineering OTC Extra Cushion

hiking and cold-weather footwear

Hike+ Heavy Crew

hiking and cold-weather footwear

Ski+ Medium OTC

hiking and cold-weather footwear

Waterproof Extreme Cold Weather Sock

hiking and cold-weather footwear

40 Below II

hiking and cold-weather footwear

T2 Hunting Extreme Cold

hiking and cold-weather footwear

Classic Thermal Merino Crew

cold-weather layering

Men's Intraknit™ Thermal Merino Base Layer Bottom

Designed for high-performance activities, this bottom features a 3D-knit for improved mobility and ventilation.

Men's Classic Thermal Merino Base Layer Crew

This classic thermal crew is made for warmth and comfort, designed for cold weather activities.

Icebreaker Merino 200 Oasis Long-Sleeve Crewe Thermal Top

The Icebreaker Merino 200 Oasis is a versatile base layer made from 100% merino wool, ensuring comfort, breathability, and moisture wicking. It's designed to perform well in various activities and conditions.

Women's Intraknit™ Thermal Merino Base Layer Crew

Our most advanced performance base is 3D-knit to maximize articulation and ventilation, designed for high-energy activities in cool to cold weather.

Kinetic Light-Compression Mesh Boxer Brief

multi-day outdoor travel

Heavyweight Merino Wool Socks

Echo Boxer Brief

multi-day outdoor travel

Maverick Boxer Brief

multi-day outdoor travel

Hunter Boot Midweight Cushion

hiking and cold-weather footwear

Outdoorsox Extra Heavyweight

hiking and cold-weather footwear

Alpine Onset Boxer Brief

multi-day outdoor travel