We also take our own colorful beach towels, which we place over the Club O light colored ones. This makes our chairs more identifiable from the water, as the current tends to move one toward the rocks from where they entered. It also provides an extra layer of comfort from the chair straps, and would make it more difficult for someone wanting a souvenir Club O towel. We've had our chair tags taken, haven't lost a towel yet, but probably most places have a similar policy. You would also be charged if you lost your room key or parking pass.