Features: 1. It is characterized by double handles, double airbags, safety protection, environmental protection and non-toxic, 0.3mm PVC thickened material. 2.The product is thick, soft and durable. It is made of high quality rain grade material, not afraid of tearing. 3.Smooth inner ring without burrs，Does not harm the skin，Seamless edge sealing，With a bonding width of nearly one centimeter and seamless edge sealing, the safety has been greatly improved. 4.Crystal nozzle，Internal and external double anti-leakage design，Even if the external air nozzle is accidentally opened, it will only leak slowly. Size details: 90#: After inflation, the inner diameter is 13.9 inches and the outer diameter is 30.6 inches, for juvenile weight 40-60kg. 100#: After inflation, the inner diameter is 15.1 inches and the outer diameter is 32.6 inches, for adult weight 60-80kg. 120#: After inflation, the inner diameter is 17.8 inches and the outer diameter is 41.3 inches, for adult weight 80-120kg.