The Patagonia Nano Air Light Hybrid jacket is a super lightweight insulating jacket offering extra protection from the cold during skiing, climbing, and other high performance activities. The Nano Air Light Hybrid is the updated, skinnier version of the original Nano Air from Patagonia, with a more condensed 40g of FullRange™ stretch insulation which keeps you warm, but also keeps you light on your toes. The front of the jacket has a 40 CFM air permeability rating, which means this jacket is not only insulating but is superbly breathable too.The two zipped pockets are always useful, and the nice detailing of reinforced material around the thumb holes on the sleeves mean you can climb over rougher rocks without damaging your coat.