Everything you need Our complete in-ground trampoline kit includes the trampoline, retaining wall, and clear instructions. Brilliant bounce Its’ all about the springs. Our in-ground trampolines are the only ones to use a commercial grade spring, we make them extra-long and we use 33% more springs than our competitors. Shhhh We are the only company to use the 100% unique TDU Vented Frame Pads - all the air escapes through the padding, for a better, quieter bounce! Triple weave vented jump mat The only trampoline with vented jump mat AND vented padding, giving you even better jumps! Easy installation We designed our trampolines for DIY installation. Don’t just take our word for it, read our Customer Reviews. The 10 x17 In ground trampoline by Happy Backyards is a safe edition to any backyard. With the unique combination of TDU™ Vented Pads and Triple Weave Vented Jump Mat the all new 17ft x 10ft CSport is not only the biggest in-ground trampoline on the market but with with the ultimate built-in airflow system you are guaranteed an unbeatable bounce on an epic scale! • Everything you need Our complete in-ground