This is the only trampoline that has built-in stabilizer legs to ensure a more secure bounce. Made by the company whose founder invented the trampoline in the 1940s, its stabilizers provide a consistently taut rebounding surface by eliminating the wobbly, lateral movement lesser trampolines that use independent legs creates. The steel-frame legs in this unit are stabilized in a complete circle, preventing stresses that can damage the supporting structure. The five steel arcs that hold the 5 1/2'-tall net enclosure fold flat over the netting, bed, and pads with the included cover to protect it from bad weather or to prevent unauthorized use. The arcs come padded with thick foam that exceeds consumer safety guidelines. Assembly required. Ages 6 and up. 9' H x 14' Diam. (227 lbs.)