This ErrlyBird Secret Stash Wristband is great for people who are always on - the - go, like concert - goers, sports fans, and festival lovers. You can wear it at concerts to keep your valuables close while you enjoy the show, at sporting events so you don't have to worry about your stuff during the game, or at festivals when you're dancing all day. It's made of terry cloth and has a convenient zipper pocket. As for size and weight, it's lightweight and fits most wrists comfortably.