The Nano-Air® Jacket was made to be worn for the entirety of your aerobic, start-stop alpine missions, so you’re never slowed down by changing layers. Warm, stretchy and breathable FullRange® insulation dumps excess heat when you’re working hard and keeps you warm when you’re not. Now built with significant recycled content in the shell, liner and insulation, Patagonia's Nano-Air collection sets another new standard for technical insulation. Fair Trade Certified™ sewn.