Titan Waterproof Pocket

Does the job well

It clips into the shorts with buttons and the flap closes over itself with magnets to keep water out. Way more convenient than those waterproof bags for going to the beach or pool. It's a really good sized pocket too, you can fit a pro max, decent sized car key fob, and some cash. I haven't had any issue with it messing with my phone or demagnetizing my credit cards.