BOOTS: Low Cut speed Profile Boot with Padded Collar and Velcro Power Strap CHASSIS: Lightweight and Strong RTX 295 Chassis with Dual Action Trucks WHEELS: 60mm Polyurethane Injection Wheels. Works on smooth Indoor or Outdoor surfaces, so you can skate at the rink or on the sidewalk. BEARINGS: 608ZB G-force sealed bearings - the seal helps keep the dirt out. For a long lasting, smooth roll. SIZES: Fits true to whole U.S. children's shoe sizes Pacer Charger is a great indoor/outdoor skate for beginners. Strong, yet lightweight boot supports the foot, increases stability, and improves the skating experience. Soft, comfortable liner has padding to cushion and protect the foot. Quick-drying materials wick away moisture to help keep feet dry. Classic laces provide a customized fit for your skating preferences, while the power strap shields laces and adds heel lock for added support. The Charger features a lightweight chassis that improves the overall skating experience. Adjustable trucks with cushions provide excellent turning control, and fixed toe-stops are durable and easy to maintain. These indoor/outdoor skates for kids are loaded with 54 mm polyurethane formula wheels for added performance and include G-Force 608ZB sealed bearings for a smooth, secure ride. The skates fit true to children's U.S. shoe sizes.