I use a wristlet when I go the gym, I just put my ID, debit card, cash and cell phone in it and clip my keys onto the clip. That way I dont have to worry about bringing a purse and leaving it in my car or in a locker at the gym, I know way too many girls who have had their cars and gym lockers broken into... and I dont want to use the key hooks by the gym door! Maybe I'm just paranoid but I like having my stuff on me! The wristlet is so great to theres always a place to sit it on top of the cardio machines so its visible and its so easy to tote around!
I also use one in my purse as a small makeup bag!