* There are 2 Boston valves on the main hull for quick filling and quick deflation. * Use high-quality strong thermal carbon polymerization non-toxic PVC material, good toughness, material thickness (0.89mm). *Slip-proof, strong pressure resistance, non-toxic and tasteless, resistant to gasoline grease and salt water, environmentally friendly and practical. * Dimensions and specifications: Inflatable length: 328 * 145 * 48CM, maximum load capacity: 1200 pounds, quantity: 4 people. *Material made of SUPER-TOUGH ligament. SUPER-TOUGH is an anti-polymer, impact resistant and sunscreen polymer tough tape. It can improve the pressure resistance of the air chamber.