Roller Derby Boy's Stinger 5.2 Adjustable Inline Skate Molded cuff for Support & easy skating with EZ Push Button adjustment system and comfort fit washable liner Polymer Frame Polyurethane wheels Silver 5 Speed Rated bearings Adjustable sizing: Small fits shoe sizes 12-2 and Medium fits shoe sizes 2-5 Supportive boot and comfy padded liner Liner is removable and washable Locking Cam-Lever buckle for a quick, safe fit Pull-and-tighten lacing system with no tying Push the button to adjust the skate up to 4 shoe sizes!<ul class="a-unordered-list a-vertical"> Pull the toebox forward to expand the size for growing feet Reinforced polymer frame is lightweight and durable Non-marking brake on right skate only (it is removable so you can switch it to the left skate if you wish) Size Small has 64mm urethane wheels Size Medium has 70mm urethane wheels Great for both indoor and outdoor surfaces Includes Silver-5 Speed Rated Carbon bearings for a fast ride Use these skates at the roller rink, or outside on paved trails, sidewalks, and boardwalks If you are a beginner, skating lessons at the rink or park are a popular way to learn Find a local rink at web.rollerskating.com/search New skaters will often try skating first inside the house, starting on carpet to go slower, then try rolling on hard floors Check wheel and truck tightness and adjust as needed prior to use Make sure wheels are clean before using at the rink You can improve balance, agility, strength and endurance, and have fun while doing it It is a low impact exercise that can be done almost anywhere It&#039;s perfect for individuals or family and friends who want to stay healthy and active Benefits include stamina, muscular strength and endurance, flexibility, balance, weight control, muscle definition, digestion, and sleep Inline skating at a speed of 20MPH can burn 360 calories/hour To help prevent injury, always wear a helmet and protective gear (wrist guards, knee pads, and elbow pads) The size Small adjusts from size 12J to 2. The size Medium adjusts from size 2 to 5. Wider feet, growing feet, or half sizes may wish to go up a size Wear thicker socks Add a shoe insert/insole (sold separately)