This Jumping Mat is constructed of polypropylene and features an extremely high tensile strength, UV protection, and mildew resistance. The surface is weather and scratch resistant. This Jumping mat is suitable for 396 (13 FT.) trampolines – 316 (10,4 FT.)Mat Size with 84-V rings. (For your trampoline size: measure the frame from one outside edge vertically and horizontally to the other outside edge and make sure to measure it both ways to confirm your size) Note: it is advised to protect this pad as much as possible when used in extreme climates and weather conditions.