The original mini-trampolines for the feet.With Moon Shoes, kids have incredible fun as they jump with anti-gravity effects while developing balance and coordination. Made of quality, high-density plastic, with adjustable VELCRO brand nylon closure straps, Moon Shoes feature a self-centering shoe platform with non-skid grip surface for sure-footed, high-bouncing thrills. Fits up to size 9 men's shoe. Maximum total weight is 160 lbs. Easy, adult assembly. No tools required.