Pacer XTX-6000 Childrens Inline Skates - Pacer Kids Inline Skates - The Pacer XTX-6000 has a hard sheel boot withc quick-lock buckles, and deluxe comfort liner. The wheels are meant for indoor or outdoor skating, made of clear polyurethane, and come with G-Force Bearings. - SIZING - These skates come in Unisex Kids sizes and are true to size.