go light or go home. this midweight layer breathes to vent sweat and keep you warm and on the move in the mountains. featuresslim fit sits close to the body, with room for the garment to move with you stretchy, breathable, and lightweight nylon plain weave fabric thermacore stretch insulation [40g] for focused warmth and enhanced breathability, [ak] dwr coating attached hood with stretch binding at opening lightweight low-profile back of hem cinch, pocket utility loop and media port packable into a pocket zippered chest pocket and hand-warmer pockets, reflective details bluesign® approved materials use only safe chemicals and reduce impact on both humans and the planet during manufacturing