1.Rugged and durable: The independent punching post is stable with the base and can withstand heavy punches and kicks without falling. The multi-layer PVC material is durable but soft enough to not harm the punch.2.Special design: This inflatable boxing column is designed with a special gas bottle stopper and water bottle stopper. The gas bottle stopper has a double lock to prevent air leakage, and the water bottle stopper is sealed and closed to avoid water leakage.3.Relieve stress: This sandbag is very suitable for family exercise or relieve stress when children sit and irritate all day. You get good exercise to prevent the outbreak of boring brothers and sisters, which is a great way to relieve stress in children and adults. You can also train your child's coordination and flexibility.4.Lightweight and easy to use: Just add water or sand to the base, then use a bicycle pump to fill the top and middle with air. When not in use, it can be empty, folded, ready to play next time, travel or anywhere you can take it with you.5.Ideal gift: This inflatable boxing column is an ideal gift for children, allowing you to spend quality time with your children and encouraging them to play independently.