I guess it depends on the base, and how hot it is and how much you sweat. Lots of people work out in theirs so I guess the heat and sweating isnt a problem for some, I excercise everyday but really dont sweat at all, plus I dont live in a place where it gets very hot so i guess it doesnt apply to me. Although I'm not wearing yet my piece is going to lace and its really small (a few cm's).