Round Trampolne Mat Replacement: Multiple Sizes Available Material: Heavy-duty Polypropylene with Carbon Coated Durability: Waterproof Surface, UV-Resistant and Fade-Resistant Security: 8-row Stitching Lines to Hold the V-rings Securely in Place Springs and Frame Showed in Picture are Not Included in Package Reinforced Galvanized V-Rings Sewn into the Mat for Extra Strength