Ive not worn them with the strap up so cannot report on fit or comfort there. He would purchase this again in a heartbeat. The sizing in the description must have been old and be sure you check the dates of the reviews. Custom lighting and images are fun too but really not necessary if youre budgeting. This makes it easy to find front when playing Ironman. I ordered a size bigger for my daughter and they were still small. Better noise cancellation So good luck. Very impressed with these slippers. Not too tight and not too wide.