The Roller Derby® Lucy Roller Skates are designed to keep kids rolling through several sizes as they grow with the sport. They adjust to 4 full sizes and are made for both beginner and intermediate skate levels. With a high top boot design and PU cushions, these skates are made to offer support and control whether they're used indoors or outdoors. DESIGN: EZ Twist Knob allows you to adjust up to 4 full sizes Made for both beginner and intermediate skaters High top boot design with great ankle support Comfortable padded lining for ankle High impact chassis with PU Cushions for shock absorption Designed for precise and controlled turning Fast and smooth rolling Silver-5 Speed Rated (carbon) bearings Urethane 54mm x 32mm wheels Designed for both indoor and outdoor use