The strap that goes between one's toes is a piece of leather with an unfinished edge.  It made a small cut between my toes.  I sewed the sides together and it was much better.  The footbed is quite excellent and if I hadn't had the problem with the leather, I probably would have given a higher rating.  I haven't tried the bottle opener on the bottom of the sole, a rather useless feature I think (every beer I drink has a twist off cap).