Built with incredibly breathable 20-g FullRange synthetic insulation, the featherlight Nano-Air 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. | Patagonia Men's Nano-Air Ultralight Full-Zip Insulated Hoody in Hot Ember, Large - Mid Layers - Polyester