I thought I found the perfect workout/running headphones, and was thrilled at first. Super-secure, and still let some acceptable amount of sound in which is much safer when running outside. But I quickly learned that they are not sweatproof at all. First pair last about a week and then one ear went. Returned them and the second pair lasted a week and a half. I really wanted them to work, so I tried one more time, and the same thing happened. They seem to short out from sweat.