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! * The Boa closure system is fast, quick on, quick off. Boa provides custom comfort, with smooth even closure and no pressure points. * Designed to build confidence in new skaters. * 72 mm/80a dureometer wheels with ABEC 3 bearings for smooth, comfortable ride * ?They?re comfortable, they?re light, they?re functional, they?ve got style? Mo ?Quadzilla? Sanders ? Inline and Derby Pioneer/Legend