Zero Gravity Trampolines Features: A netting sited directly on the edge of the jumping surface supported by arced uprights improve safety in the event of a fall, whilst a wired top ring retains the shape and structure of the netting The safety padding's top surface is made from ...Zero Gravity Trampolines Features: A netting sited directly on the edge of the jumping surface supported by arced uprights improve safety in the event of a fall, whilst a wired top ring retains the shape and structure of the netting The safety padding's top surface is made from PVC rather than cheaper, inferior PE, giving a quality look and feel that unlike PE will not disintegrate under UV rays Even before gaining EN71 certification this trampoline went through extensive testing at the Zero Gravity testing lab.