Heavy duty nylon butt pack with enormous main compartment that measures 15" x 13" x 5" and has drawstring closure and flap cover to protect your gear. Three 1 1/4" web straps secure the flap to 3 rugged metal buckles. Two bottom adjustable web straps to attach bed roll or jacket. Three additional metal attachment loops on the bottom and stitched web loops on both sides to accommodate entrenching tools or other gear. Rear belt loops for easy attachment. Used excellent.