Hmmm, looks a bit bulky. I’m sure I’ve seen waterproof players, with matching ‘phones. That’s the important bit, it doesn’t matter if the player’s impervious to water if the phones get trashed first time a wave goes over your head. The other option is a waterproof case and phones, I’m pretty sure I’ve seen those around. If all you want is to protect a player while you’re on the beach, so you can go for a swim and not leave it where it can be stolen, then there are all sorts of waterproof travel pouches for money and documents you could pop a player into, with the phones lead coming out of one corner, then just put the phones inside and seal it up when you jump in the drink.