This replacement safety netting for your 15ft round trampoline is made from super strong and flexible terylene thread and the intelligent design uses a free standing net to minimise the risk of accidents involving the upright posts this netting is designed specifically for 15ft round bigair trampolines but it may also be suitable for other 15ft round trampolines with 12 enclosure poles and where the safety netting fits inside the outer ring of safety padding bottom of netting attaches to jump