Patagonia Men's Nano-Air JacketDESCRIPTION: Zip the tent shut, flick on the headlamp, swing the tools, tag the summit and return for every moment of an alpine mission, the Nano Air Jacket delivers a breakthrough in active insulation. Through high output, stop and go alpine missions its exclusive fabric package integrates the qualities of fleece, soft shell and puffy by combining a plain weave liner, warm when wet FullRange insulation, and a lightweight yet durable, weather shedding