Built with incredibly breathable 20-g FullRangeA(R) synthetic insulation, the featherlight Nano-AirA(R) Ultralight Full-Zip Hoody is the midlayer you can put on at the start of your alpine objectives and forget about completely. It offers that boost of warmth and protection you need in spitting snow or howling wind without making you overheat when moving fast. Stretchy, Breathable, Weather-Resistant Fabric Shell and lining fabric is built from 100% recycled polyester ripstop with mechanical stretch, exceptional breathability and improved abrasion resistance, with a durable water repellent (DWR) finish made without intentionally added PFAS to resist light moisture Featherlight FullRangeA(R) Insulation Light, breathable and stretchy 20-g FullRangeA(R) insulation provides featherlight warmth through the hood, shoulders, upper arms, chest and back; breathable underarm panels vent heat and reduce bulk Light Touch Expansion Hood Minimally bound, stretchy Light Touch Expansion Hood with passive adjust fits with and without a helmet and easily pulls on or off, even when the jacket is zipped; center-front zipper has a zipper garage at the chin for next-to-skin comfort Technical Fit Slim fit built for comfort under a harness and a backpack, and articulated patterning provides exceptional range of motion Self-Stuffing Chest Pocket Low-profile, generously sized chest pocket keeps essentials warm and close at hand; entire hoody easily self-stuffs into the chest pocket with a carabiner clip-in loop Moisture-Wicking, Stretchy Cuffs Stretchy, soft, moisture-wicking and quick-drying CapileneA(R) Cool Lightweight fabric at the lower arms adds extra stretch to push up sleeves over forearms