light, techie, and packable warmth. wear on its own or layer under your shell for maximum warmth in the coldest conditions. featuresslim fit sits close to the body, with room for the garment to move with you pertex® shell and lining is functional and lightweight, maximizing strength without adding bulk, [ak] dwr coating 80/20 rsd down 800 fill provides lightweight high-loft warmth removable hood with front adjustment drawcord cinch at hem, elasticized cuffs, pit zip vents packable into a pocket, pocket utility loop zippered hand-warmer pockets and zippered internal chest pocket bluesign® approved materials use only safe chemicals and reduce impact on both humans and the planet during manufacturing