1.6m Inflatable Boxing Bag Training Pillar Tumbler Column Punching Bag Pressure Relief Exercise Water Base Standing Sandbag Fitness Equipment. Made of PVC building materials, it is ideal for exercise and play, improving coordination and flexibility, burning calories and reducing stress. It can be used for adults and children, and is also suitable for taekwondo training. The sturdy PVC material guarantees safety and durability. Fill the boxing ring with soft rubber and seal it. To use, open the bottom and add water or sand to increase weight, and keep it on the ground. It can be folded and stored, making it practical and safe.