The Arc'teryx Kyanite Baselayer Zip Neck Top delivers heavyweight warmth for cold lift rides and high-output winter activities. The brushed polyester interior traps heat against skin while the durable nylon face resists abrasion from boots and outer layers, creating a warm, durable layer that works equally well for skiing, running, or any other cold weather activity you can dream up. Articulated patterning and stretchy construction ensure unrestricted movement, and the zippered sleeve pocket keeps small items secure.