Buy Strength Equipment Advantage: High-quality PVC material for long-lasting durability. Transparent color and graduation let you know how much water filled. Max. bearing: 25kg / 15kg. Fill water and air inside the bag to increase instability and train your muscles and balance. 4 soft handles ensure firm grip and allow for variety in your exercises. Comes with an air pump to fill air and inflate the bag. Parameter: Item size20*85cm/26*85cm Packing size41.5*19*12cm/87*54*39.5cm NW/GW13.50kgs ColorWhite MaterialPVC FunctionMix water and air into the bag body, use the weight of water and the instability of the flow, not only to exercis