I just worked out in it and I have no complaints as of yet. It definitely did it's job, after a 30 min workout on an exercise bike I lost the equivalent of 2 cups of water in sweat and excess water. My patio was covered with drops of sweat, it looked like it had rained. As I intensify my workouts I'm hoping it does not tear cause I do a lot of cardio. I suggest you buy a size slightly bigger than you actually are to prevent tearing.