Constructed of rugged, tactical polyester. Compatible with MOLLE and ALICE attachments. Hydration bladder compatible. Self repairing zippers. PU (polyurethane) coated lining and pockets to prevent water from entering the pack. 1 large main compartment with zippered pouch. Rubberized water bottom. Padded back with breathable mesh backing for comfort. Removable and adjustable waist belt for a tight and secure fit. Adjustable padded shoulder straps. Top carry handle. Top and side adjustable web straps with quick release buckles. Dimensions: 19" x 15" x 8". The large modular transport pack is large enough to carry all your military and tactical equipment. The rough and rugged built backpack will withstand the harshest abuse in the battle field or while camping.