Windproof yet breathable Polartec Windbloc 100% polyester bonded micro-velour fleece Chin flap with fold-over zipper cover for comfort Seamless shoulders for pack-wearing comfort Pockets: zippered left chest, internal zippered left chest, & zippered handwarmers 10.5-oz Polartec Windbloc 100% polyester double-sided fleece bonded to a stretch laminate.