54" Round Trampoline Children with Saftey Enclosure Net Pad Frame: Heavy Steel Frame with Rust-resistant Finish and Rubber Feet Pad: Durable Water-proof Pad Filled with Thick Foam, Reinforce Impact Protection Mat: Heavy-duty Polypropylene Surface, Water-proof and UV-resistant Size: 54" Diam Idea for Physical Training or Entertainment for the Entire Family Indoors/outdoors