Thermals

Heavyweight, fleece backed, body hugging legging with natural wicking properties. CONTENT: 85% Nylon, 15% Elastane https://www.nils.us/fitting-room

The UltraGear Bottom is designed to provide dynamic movement and base protection on your best adventures. Flat seam construction creates a sleek, comfortable fit, while an elastic waist keeps your...

Built for warmth and comfort, our UltraGear ¼ Zip provides the foundation for your winter setup. A ¼ zip closure and chin protector offer wind protection, while elastane knit construction...

Whether worn as a winter base layer, or a cool-weather pant, the UltraGear Bottom has the versatility to handle any adventure. We created it with elastane and double-knit fleece keeps...

The Youth Active Stretch Bottom provides a warm, flexible thermal base layer designed for active kids. Its stretchy fabric moves with your child, offering comfort and insulation during outdoor adventures...

Keep your young adventurer warm and comfortable with the Youth Active Stretch Crew. Designed as a thermal base layer, it offers excellent insulation while allowing full freedom of movement. Its...

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 enhanced fit to improve functionality while...

Embrace warmth and comfort in the great outdoors with our Women's Cloud Nine  Performance Baselayer Leggings. These versatile leggings feature an ultra-soft brushed fabric surface that traps air for warmth....