Jumpfly 15 ft. Replacement Trampoline Mat 100V Orange ?DURABLE STURDY MATERIAL? Jumpfly trampoline mat is made of polyethylene with a tightly woven design that protects against splits, tears, and rips. Heavy-duty UV-resistant protectant ensures the mats will keep their integrity and rebound for countless years to come ?SUPERIOR BOUNCE? Jumpfly trampoline mats feature thicker steel rings, a higher stitch count to keep the v-rings more secure, and most notably. 8 rows of stitching to keep it secure from tearing and enjoy the fullness of the gymnastic mat ?MEASUREMENT? The first is your trampoline's frame diameter, then your spring (or v-ring) count, and finally the length of your springs measured from hook-end to hook-end