Just from reading the description and the grammer errors I could tell this wasn't written by someone with a grasp on the English language. Add in the piss poor reviews and you should know what you're getting. _UCKED!
That’s a good question. I would say they would be perfect for that but they made the cards so dark that you can’t see the numbers on them and that’s above water in full light. So I would say there is now way you would be able to see the cards under water. I had to return the ones I bought