These shoes are perfect for water walking in the pool everyday.  They are non-skid for the wet pool deck, they dry overnight, and are very light on the feet.  My only quibble is that the cloth over the insole worked its way unglued and off after only a couple of weeks of daily use leaving a surface underneath that is very non-skid on my feet.  Much walking on dry surfaces makes my feet burn from the friction.  There isn't a lot of extra length in the sizing.  If you absolutely wear the European size 42, go one size up.  My toes are at the very end of the shoe.  They fit, but just barely.