Airzone 10-Feet Spring Trampoline with Enclosure Airzone trampoline frame is manufactured using durable, rust-resistant steel Legs are W-shaped, creating 2 contact points for each leg for additional stability High-performance, stainless steel springs are protected by a weather-resistant PVC frame cover and thick sewn-in padding Improved enclosure set-up eliminates multiple drawstring ties and secures the enclosure to the frame Added bungee cord around the top of the enclosure keeps netting taut and secured to the enclosure masts