Your little one can have hours of bouncing fun on the JumpZone Premium 15' x 17' Oval Trampoline with Enclosure (Box 2 of 2), which features a galvanized, rust-resistant steel frame with 6 W-shape leg bases for stability. The 96 heavy gauge springs and the UV-protected, PVC-coated spring cover with extra-thick padding help ensure a great bouncing experience, while the safety enclosure poles are covered with foam padding and placed away from the netting for added safety.