After seeing how these held in shape for my children, I decided to purchase one for myself. I ordered one size up as I didn't want it too "fitted." I was glad I did. After swimming in chlorinated pool for many months, it's still holding up in good shape and wouldn't swim without it. As these are not lined, I would highly recommend to wear over bikini bottom. They are very comfortable, provides good, modest coverage. If you are looking for a modest appearance when swimming, I highly recommend them!