60% cotton / 40% polyester twill BDU 4-pocket coats by Propper. Propper's BDU 4-Pocket Coat is sewn to military specification MIL-C-44048G and features drain holes in the Bellows pockets, fused pocket flaps and collar, chest pencil pocket, two-piece double-reinforced elbows, felled side seams and sleeves, and adjustable sleeve buttons.