I was so worried it would slip off and I would be exposed (I had on a backless, sheer shirt). It remained on trough me sweating and the rain. I used it again with a backless dress I wore to the club, even through it's second use and me sweating from dancing, it still stayed on. I'm so happy with this product and the price was great! I want another one, but the first one is so sturdy it seems like it will last for a while. Which is why I'm keeping this in my buggy cause I'm going to come straight back to this product when I do need another one.