The Ozone 500® Girls" Twister III 2012 Quad Skates feature PVC and mesh uppers with composite frames for long-lasting use. The nylon comfort liners and power strap closures offer a secure, supportive fit, while the 54 x 32 mm PVC-injected wheels and semiprecision 608Z bearings provide a smooth ride.Features and BenefitsPVC and mesh uppers for breathability and comfortable wearComposite frames for long-lasting useLaces and power strap closures offer a supportive fitNylon comfort liners for a secure fit54 x 32 mm PVC-injected wheelsSemiprecision 608Z bearings for a smooth ridePVC brakes