Boxing water polo is the ideal training equipment for every boxer. The water bag made of PVC material is filled with water which better imitates the human touch than sand bags, and can automatically return to elasticity for more natural exercises. In addition, the water bag filled with water can better absorb fist strikes, and effectively protect the hand joints in the intense training. It is very convenient to add water. The best weight after adding water is 30kg, and the maximum weight is not more than 40kg. Boxing water bag is different from the traditional sandbag which does not occupy space and is very portable, and as long as water and air is emptied, it can take up very little space, which is easy to carry on the trip.