Water walking ball is a very fun water recreation products, unique high transparent single-layer structure, and surface contact with people when there is a very wonderful feeling. This product uses TPU (Thermoplastic polyurethanes TPE rubber) and military zipper manufacture, TPU has a strong toughness, cold, oil, hydrolysis resistance and aging resistance, waterproof zipper case of gas leak in the case of the proper use of the military need not worry security Question. (See proper use of safety instructions)