I have the otter box and it seems to work well. I am sure there are better ones out there but I was thinking cheap and figured that with the replacement cost of the phone I shouldn't be swimming with it. I bought a plastic box thing at West Marine for like 1.99 that I put the phone in while I am in the boat and only remove it to make or recieve a call.
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"A bad day fishing, is always better than a good day of yard work"