I have given these things a thorough test wearing them to teach classes, everything from kickboxing to Pilates, bicycling with my group and racing with multiple helmet removals, out on the lake kayaking, and running errands. They stay in place, they keep the sweat and the lake water out of your eyes, and the hair back. I really like cycling with them because they offer a nice barrier between the forehead and helmet. I've also gotten a lot of compliments on them from both my young and senior clients.
So if you're looking for a great head band that's functional and fashionable, give Bolder Bands a try!