These are by far, are some of the best band-aids I have ever used in my life. When they say waterproof, they mean it. I have swam with these band aids for a few hours and they have not budged at all and the skin underneath stays free of water. They are also heavy duty and provide amazing padding. For example, ladies, if you are having troubles with brand new heels/flats/shoes rubbing against the backs of your heels, these are wonderful - they give enough cushion and last all day, even when your shoes are rubbing up against them. And even though they are so heavy duty, they still come off very easily.