8FT/10FT/12FT/14FT/16FT Trampoline with ladder and with safety enclosure net, outdoor/indoor trampoline with heavy duty jumping mat and spring cover padding for kids and adults.The fabric is usually a waterproof canvas or woven polypropylene material. As with competitive trampolines, recreational trampolines are usually made using coiled steel springs to provide the rebounding force, but spring-free trampolines also exist.