The S.T.O.M.P. II was designed to SEAL team medic specifications. All material is made of heavy-duty 1000 denier nylon. All padded areas are closed cell foam. The adjustable shoulder straps, sternum strap and adjustable web belt make for a comfortable fit. Cinch straps are included for the sides and top to maintain load integrity during stress maneuvers. All of our zippers have our silent pulls. Grommets are provided for drainage. Note: Medical supplies not included.