Note: Our sandbag made of durable PVC material, please avoid exposure. In order to prolong the life of the product, please use it indoors. Adopted the principle of tumbling, which can always keep it upright after hitting. It can absorb shock and protect against accidental injuries. You don't have to worry about your kids getting hurt.^ SUITABLE FOR ALL AGES: Our inflatable punching bags are about 160cm tall. It will help boys and girls have fun, stay active and exercise, increase their speed and strength, and find relief from their stress or anger in a sporty and safe way.^ Easy to use: put water or sand in the base first, then inflate the punch body. Sand has been shown to be more effective for larger children and adults. Easy to inflate and deflate, can be folded into small size for storage.^ Widely Use: Since this karate bag is inflatable, you can take it anywhere. Improves coordination and flexibility, burns calories and relieves stress while increasing agility and hand-eye coordination.^ Double Seal Deaign: Sealed double cap design effectively prevent water or sand leakage. If you receive product quality problems, please contact us in time.