Health and environmental protection materials are made of assured thickened PVC, which can resist most extrusion, waterproof, wear-resistant and safer The automatic closed inflation port is not easy to leak and is safer. How to give up pinching the inner side of the exhaust port and pressing the airbag? It is recommended to exhaust about 90% at most. Do not inflate excessively. It is easier to maintain balance in the water and make children swim happily and safer. Adjustable safety buckle, don't worry about slipping, enjoy playing. The air leakage proof valve has good sealing performance and no air leakage for a long time.