13" Round Trampoline Mat with 96 Rings. Frame should be 15". Replace your worn out, stretched out jumping mat with this new High Quality, long lasting model. The mat is made of an industrial fabric called Permatron made by the Baycor Corporation. Permatron has been the choice of trampolines for decades. It is specifically engineered for trampolines and rebounders. It is constructed with polypropylene loaded with carbon and features extremely high tensile strength, UV protection, and mildew resistance. Permatron can hold up in the most extreme climates and resists weather conditions such as precipitation and sunlight. It is flexible, but does not strech. It will provide a firm and stable surface, yet is supple enough to cushion joints. Permatron does not crease or fold and will always return to its original flat condition. This unique process for manufacturing Permatron has been time tested for over 20 years. These methods lead the industry in producing the best trampoline fabric. Permatron undergoes the most significant finishing process in the industry. What this does is it thermally interlocks the fibers of the fabric, makes it smoother and provides width stabilization to withstand constant flexing and stress. The results show a stronger, sleeker material, with a superior puncture resistance and a surface that is more pleasing for the user. Its smooth surface gives an extra comfort for the user. Also it is manufactured with a proprietary four-pick insertion technology enabling a unique weave pattern for superior strength and durability. Permatron is virtually defective free. Permatron provides the ultimate in quality and performance. When selling or buying a product that has been made with Permatron, you can be confident in its performance and value. 96 Spring Rings (make sure this matches your current frame). High Quality stitching holds the v-rings securely in place . Color: Black.