JumpSport 10'x17' StagedBounce | Includes Rectangular Trampoline, Safety Enclosure, and 108 High Performance Springs | Exclusive Spring Technology for Performance and Safety Provides the largest sweet spot landing zone of any trampoline from beginners to experts. Patented StagedBounce technology and High-Stretch springs for smoother, safer bounce experience. 10 Year Warranty!* JumpSport trampolines are the first and only trampolines designed to reduce the risk of injury directly on the jumping surface Perfect for budding gymnasts, cheerleaders or any athlete seeking to improve their game. Meets or Exceeds ASTM Impact Performance Test standards. Unique Double-Truss Heavy-Duty frame made from of Cold Rolled Steel for strength and durability.