Bungees instead of metal springs, more soft and sensitive bouncing. (Much lower spring rate than metal springs, so the extension is faster .)Expanding with silence, very low noise, almost no.

Patented elastic fixation structure, wearing resistance. Preferred Bungee rubber quality and outer warping strings,which can with stand 200,000 fatigue test.

Safer than metal springs. Sometimes metal springs broke and burst out, it may hurt the user or people around the trampoline. Soft bungee cords never has such issue.

Bottom safety net is fixed to jumping mat by zip, completely closed, no gap no foot entrapment, so kids are bounded safety in the net. Zip also for fast assembly, and easy to replace

Upper net poles are flexible and strong fiberglass poles , nets are fixed with tension, no loose. Fiber poles are tested with enough strength to pass allsafety test