AXG unfilled hanging punching bag CUSTOMISABLE FILLING - with a zipped top design letting you adjust the weight of the heavy bag EXTREME DURABILITY - each bag is double stitched, reinforced with heavy duty D-shackles FREE SWIVEL HANGING CHAIN - with each punch bag set to get you started without delay. Thumb strap ensures ease of use with a hook and loop closure for a secure fit. It is recommended that hand wraps are always used under boxing or training gloves for ultimate wrist and knuckle protection. Includes three pairs of hand wraps.