1-4 rider tube for boating: Towable tube maximum weight capacity of 510 pounds, inflated size of 77x71x35in, using a large 0.8mm heavy-duty PVC airbag, completely wrapped in 840D double-stitched nylon cover to ensure comfort and years of use High performance: Boat tube with comfortable EVA foam pads and double webbing foam handles with joint protection, soft and easy to grip at full boat speed, minimizing elbow rash/burn Comfortable and stable: High backrest and wide sidewalls prevent you from being thrown out of the water tube during fast rides, making it safer and more stable for young children Speed Air Valve: Inflates or deflates your towable tube very quickly and easily. In addition, the safe one-way inflation design minimizes the risk of air leaks while you are on the water Vibrant color scheme: The KMJETNIVY towable tube comes in a more vibrant color scheme, allowing you to be noticed on the water and bring fun to your family or friends while participating in water sports We has been committed to designing family recreational products for water sports and winter skiing to provide consumers with better products, constantly collecting user suggestions and continuing to make technical upgrades. This SUPER SOFA for Towable Tube is the product of a new upgrade after collecting many users' opinions, with enhanced dual traction system, strength and durability, safe deck seat, extra high backrest and sidewalls, making it safer and more stable for young childrenMaterial: double seam nylon cover and cold resistant 840D PVC, Brand:KMJETNIVY