One word, should be two: Lifeproof.
This is the post I wrote on my phone after a wave crashed into my phone.
Incidentally, and equally important, this is the same phone and case that survived a 20 mph drop from my bike as well. Butter fingers.
Lifeproof: Expensive as hell and worth every penny if you’re active and have to take your phone everywhere. No plastic sandwich bags, no worrying about sweat, just slide it in your back pocket and go.