Designed for hybridized warmth and maximum breathability while moving in cold weather, this jacket has 100% recycled polyester PlumaFill insulation in the front panels and arms for warmth; the panels in back and under the arms are not insulated to allow heat dumping during high-output. The main body fabric is 100% polyester (87% recycled) and is highly breathable, with a PFC-free DWR finish (durable water-repellent chemistry that does not contain perfluorinated chemistry) for additional protection while you're on the move. Fair Trade Certified™ sewn.