Skywalker Trampolines 15-Foot Square Trampoline with Enclosure Net &ndash; Added Safety Features &ndash; Meets or Exceeds ASTM &ndash; Made to Last &ndash; Extra Jumping Space Although not required by law, all Skywalker products are thoroughly tested for safety and durability; they meet or exceed all ASTM standards Safety is our #1 priority and our patented no-gap enclosure design eliminates dangerous gaps between the enclosure net and the jumping surface. By attaching the net at each spring, children are safe from hazardous pinch points and openings We stand behind our quality guarantee with our 3-year limited warranty on the frame and 1-year limited warranty on all other materials 96 tightly-coiled springs, 7.7" long are located around the outside of the enclosure net for added safety. Each spring is made of steel, and features a rust-resistant coating for a longer life The enclosure net features a dual zipper and latch clip closure system to keep kids safe while jumping Our high-quality polyethylene netting is tightly woven to keep fingers and toes from getting caught Enclosure system features upright foam padded poles for added stability. Each pole is angled at the top to keep the net away from the poles for added safety while jumping This trampoline for kids is a great addition to your backyard along with our other playground equipment including our swing sets, jungle gyms, and monkey bars This item ships in 3 boxes that could be delivered at different times; wait to assemble until both boxes have arrived