Description: Mix water and air into the bag, and use the weight and instability of the water to exercise not only the commonly used muscles, but also more muscle groups nearby, which achieves a training effect that is better than that of ordinary weight-bearing bags. Easy to fold, carry it with you, no burden on travel Obvious scale and free control of weight to meet the different needs of different groups of people Made of 1MM thick environmentally friendly non-toxic PVC material, durable and not easy to break Water-filled inflatable, elastic, not afraid of tenderness, not afraid of smashing the floor Specification: Material: PVC Size Chart: 20kg/44lb: Diameter 20cm/7.87inch, length 60cm/23.62inch 25kg/55lb: Diameter 20cm/7.87inch, length 75cm/29.53inch 30kg/66lb: Diameter 24cm/9.45inch, length 72cm/28.35inch 35kg/77lb: Diameter 24cm/9.45inch, length 74cm/29.13inch Package Includes: 1 Piece Fitness water bag Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! 3. Wish you a wonderful on-line shopping!