My little round chi stabilizing device got wet and some of the back peeled off but I just tape it to my body in a place I where won't lose it. I really notice a difference when I have it on. Our apartment faces the back of a school with a line of little portables, all with their own heat pumps and the fans go on and off incessantly through summer and winter and it used to make me crazy. Now, I feel calm even though I can still hear them.