GI spec 3-Day backpacks constructed of durable 1200D ballistic weave material (multicar bag constructed of 500D cordura nylon) universal webbing to attach pouches and accessories padded shoulder straps with adjustable/removable elasticized sternum strap waist strap is adjustable/removable backside is padded for comfort loop for attaching name, rank, or 5ive Star Gear morale patches reinforced drag/carry handle universal webbing on bottom with straps for bedroll/sleeping bag hydration compatible up to 3L bladders 20" x 12" x 8".