I have had these for nearly three months now. I have used them once in chlorine water and they seemed to be fine. The true test was recently, when me and fellas went white water river rafting and were flung from out rafts! These shoes never felt lose, never flew off. They are comfortable and protective, my feet banging against rocks yet I felt no pain. The grip/traction of the shoes is great, but not when going up against rushing water on slick plant covered rocks (a slight a against nature, not the shoes). Wearing these shoes sockless, I ordered my usual size 11.5. These shoes do run a bit snug, but without socks they are great. If wearing socks go up a half or full size.