Adjustability up to five full sizes means kids won"t outgrow a K2 adjustable skate, it"s simple to fine-tune the frame to fit different-sized feet, your child can wear these year after year as they grow, and then hand them down! * This frame is designed to absorb road vibration and lower the skater?s center of gravity for a smooth, controlled ride. * Designed to build confidence in new skaters. * 70 mm/80a durometer wheels with ABEC 3 bearings for smooth, comfortable ride * Easy-pull lace system with locking buckle and pushbutton adjustment