I had been using those trendy "don't leave a kink" elastics and they were just not doing it for me. I am a novice runner and I would have to stop at least once during a SHORT run to put my pony tail back in place. These elastics are great, they really do stay put! I haven't had any issues with them falling down. The only things is if you are going to use multiple for a messy bun or something they are a little big and it makes them harder to work with. But all around, would certainly recommend.