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686 Huf Plantlife Base Layer Long Sleeve Top 90% Polyester • + 10% Spandex• Stretch Fabric

Made for cold days and mixed output activities, the women's Arc'teryx Kyanite base layer bottoms provide freedom of movement and have a soft, brushed interior that traps heat to keep...

Between growth spurts and back-to-back activities, tweens need a base layer that adapts just as fast as they do. The Evolver Crewneck is designed for the in-between years—with stretch, breathability,...

Somewhere between kid and teen, comfort gets complicated. The Evolver Base Layer Pant is built for this in-between stage—lightweight, stretchy, and durable enough to handle changing sizes, shifting temps, and...

No matter what Mother Nature has in store, step into the cold with the warm, dry comfort of the Men’s Summit Base Layer Pants. This cold-weather staple boasts smart ventilation,...

Built to keep your blood pumping in sub-zero temps, the Men’s Vista Base Layer Crewneck is made of stretchy, breathable microfleece fabric that feels plush against the skin with every...

Crafted to keep you moving in sub-zero temps, the Men’s Vista Pant provides cozy all-day comfort in a stretchy, breathable form. Enjoy the feeling of plush microfleece fabric against your...

What happens when you blend comfort, warmth, and breathability? You get the Summit Crewneck—a base layer designed to handle every run and backcountry adventure with beauty and strength. Feel the...