I bought these right before my trip to the USVI and they were the best thing I brought!  Besides being waterproof, they have the famously jelly like soles so they are super comfortable to walk around in and after doing tons of walking, I never had any issues with sore feet.  I also really like the small heel, which gives this shoe a little extra something.  If you're cool with the rubbery look of the shoe, they are an A+ purchase, especially for use at the beach or the pool.