1. Principle: Mix water and air into the bag body, use the weight of water and the instability of the flow, not only to exercise the commonly used muscles, but also to train more nearby muscle groups 2. There is a scale on the back, inject suitable water, and adjust the load freely 3. 1mm thick environmentally friendly non-toxic PVC material, easy to fold, easy to carry 4. Stop-and-swing motion handle, with 2 snatch handles on the side 5. Special air nozzle design, convenient for water injection and inflation, not easy to leak 6. Soft and elastic submersible handle for comfortable grip 7. Dimensions: 20 x 75 cm 8. With air pump and adapter
