The removable foot bed moves around and slips out while walking laps in the pool.  But who cares!  I just pulled them out and left them out, and it's good enough.  I prefer this one with the adjustable strap in the back as my heel is narrow.  So they get 5 stars since compared to others these are the best.  (I only wish the soles were cushy-er but still allow for fast drying...and since the removable foot bed is of no use as it just slips out, there is little cushioning but works for me.)<br /><br />Updated Review: 2nd pair that I had as a spare pair fell apart in 2 weeks.  Gave up on this brand and am trying a different more expensive brand.  Will update when I find out how well they hold up.