This is made of the finest 22 oz. vinyl impregnated nylon. Triple stitched construction with weather resistant Dacron thread. Triple layered stay-put hanging straps, supported by triple layered cinch for extra strength and performance. Closed welded steel D-rings. Filled with all cotton and polyester material--will not form pocket or hard spot. Chains not included. *additional shipping may be added to heavy bags over 50 lbs.