I pronate and have been measured as a severe pronator on both feet (20 and 23 degrees). In addition to this my right ankle has suffered multiple critical sprains during my life and has never worked properly since my teens. For those of you that have read my many posts on the subject, I support lace free skating - to teach you how to skate and to counter pronation. On the former, it definitely does this, you can't hide from poor technique. On the latter, it does work, to a degree..... It works