The typhoon semi soft adjustable quad roller skate has a specially designed light weight frame with easy toe adjuster systemthe stylish upper not just looks great but gives fantastic support and has an air cycle system for extra comforttechnical specsboot childrens adjustable semi soft quad skatewheel 54 x 32mm 82a pu cast with semi clear swirlchassis nylon hi impact with aluminum trucksbearings abec 5stoppers pu cast semi clear with swirl colour and easily replaceable bolts