Big Time Toys Moon Shoes Black Super-fun original mini trampolines for the feet let you jump with anti-gravity effects while developing balance and coordination Features a self-centering shoe platform with nonskid grip surface for sure-footed and high-bouncing thrills Made of quality, high-density plastic, with adjustable easy-close fastener nylon closure straps For kids above 7 years, fits up to size 9 men's shoe and maximum total weight is 180 pounds Easy, adult assembly and no tools required