Material: plastic Recommended ages: 3-6 years old, 6-12 years old, 14+ years old 【High-Quality Material】The inflatable tumbler is made of high-quality PVC material, which can withstand severe kicking, is lightweight and durable, and has a long service life. At the same time, we must strictly abide by training standards to avoid excessive rebound. Optional height: about 1.2m / 47.2inch, 【Ergonomics】The boxing punching bag is ergonomically designed and has a human-shaped cylindrical design to enhance the combat ability of training. The boxing is positioned to effectively land on the sandbag, making boxing training and entertainment better. 【Multi-Function】This fun inflatable sandbag is great for keeping fit and can also be used as a stress buster. Improve coordination and flexibility, burn calories and relieve stress while helping to improve agility and hand-eye coordination. The fist can be moved back and forth every time, which is also very suitable for boxing and can be used by adults and children. 【Inflatable Sandbag】The sandbag has two compartments, one layer is used to add water or sand to add weight to make it stable on the ground, and the upper layer is used to help you train skills. The base can be filled with sand or water for stability.