600 denier polyester material. Top quality craftsmanship, detailed construction. 3 large vented outside pockets. Extra wide heavy padded kidney pad and strap. Heavy padded shoulder straps. Waterproof lining. Accessory flaps. A favorite of military personnel, campers, bicyclist, hikers, fisherman, outdoors men, and much much more. GI Government Issued style. Olive Drab - Medium GI type ALICE pack w/no frame, 20" x 19" x 11". Dimensions: 20" x 19" x 11" (inches).