I bought these for my child to use at the kindergarten pool, but they've outgrown them, so I'm putting them up for sale (*^^*) They were only used during kindergarten pool time, but there's a bit of stickiness on the heel where I had a name sticker. *Please comment if you'd like more photos. Other than that, there's no noticeable dirt, and I think they can still be used! Please understand that this is a personal inspection, so your understanding is appreciated.