Functional, comfortable, and fun, the Roller Derby(R) Boys' Tracer Inline Skates are great beginner skates. They feature a soft-boot support system with a dual cam-lever buckle so he feels confident as he skates through the park. As he gets older their functional design expands so they won't need to be quickly replaced. These skates feature urethane wheels and Excellerator 608ZB bearings. FEATURES: Adjustable inline skates with push button system Strong, reinforced nylon frame Soft boot support system Dual cam-lever buckle offers secure fit Comfort fit padding Bearings: Excellerator 608ZB Wheels: 64/72mm Urethane Small Size: 12J-1 Medium Size: 2-5 Manufacturer's 90-day warranty