Shoe Wheels: Heel wheels crafted from heavy-duty polycarbonate are tough enough to handle any terrain and designed to light up the streets for the ultimate thrill-seekers Ideal Fit: Snug and secure for a wide range of users, designed to accommodate U.S. shoe sizes youth 12 through adult 12 for riders of all ages Replaceable Pads: Easily keep your wheeled shoes going by effortlessly swapping out spark pads for continued fun and excitement Solid Frame: Featuring a heavy-duty polymer frame with a "quick-click" mechanism and hook-and-loop strap for easy attachment Smooth Ride: Glide effortlessly on proprietary 50-millimeter urethane wheels with sealed bearings, ensuring a smooth and exhilarating experience