The Down Bomber Jacket pairs our signature waxed cottons with 650-fill-power down for heavy-duty warmth that weighs little. The torso is constructed from 8-oz. water-resistant oil finish Cover Cloth, with waxed 11-oz. Shelter Cloth for the shoulders and sleeves for increased durability and weather protection. The patch pockets are made from oil finish Shelter Cloth and lined with 100% wool for warmth. The classic bomber design features sturdy wool-blend ribbed cuffs and hem to keep warmth in and seal out cold wind.