Roller Derby"s GS 3000 Men"s Quad Roller Skate features a speed profile boot with deluxe comfort and outstanding support for a better skating performance. The Power Retention Strap insures a snug fit which allows improved ankle and heel support. The Vacuum Chrome Nylon chassis, with the Double Action Cushion Aluminum trucks, provides enhanced control. The Formula Chrome-Tec wheels and ABEC-3 bearings provide a fast ride with smooth traction.