Roller Derby Girl's Laser Speed Quad Skate Man Made Boot: Reinforced comfort fit boot with heel stabilizer, padded collar, and laces & Velcro power strap Chassis: Tru-Tac Wheels: 54mm Clear Urethane with Pro Core Bearings: ABEC 7 Deluxe speed boot design Soft, cushioned lining with quick-dry lining Padded collar helps keep the foot secure and comfortable Classic laces for a great fit Velcro power strap provides additional security and keeps laces in check Tru-Truck chassis is lightweight and sturdy Real metal trucks give maximum control for turning Urethane cushions help dampen vibrations for a smooth ride Fixed toestops on both skates 54mm Pro Speed wheels Gold-7 Speed Rated Carbon bearings go fast 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) Half sizes may size down for a more snug fit Wear thinner socks Wider feet, growing feet, or half sizes may wish to go up a size Wear thicker socks Add a shoe insert/insole (sold separately)