I bought these swim diapers (not the first ones I purchased and used for my toddler daughter) and was surprised how long it took for them to dry. They did everything they were supposed to do and the buttons on one side are a brilliant idea. But if you go on a beach trip where you expect to be in/near water for several days in a row and not necessarily with access to a clothes dryer, you need 2 for use on alternating days. Even in the warm tropical sun they took almost an entire day to dry.
BTW, #2 was hard to get out of the fabric mesh liner and we really only managed to get it fully clean in the washing machine. This has not been my experience with other swim diapers. Maybe next time, I will opt for disposables instead in a similar situation. If you use these in your own pool or will be near washer/dryer, these will work great for you.

As stated before, the snaps are great, they would be even better on both sides. Try wriggling a wet toddler out of a wet and soiled diaper and you're happy for all the help you can get!