Otterbox has just recently posted this advertisement to promote their new Armor Series cases.
Otterbox had this to say... "The Armor Series can withstand a 20 foot drop, 10 feet in water, 2 tons of crush and doesn't allow any dust particles in your phone. It's basically the toughest case ever. Check out Rush Sturges & friends testing the Armor Series:http://bit.ly/KayakingArmor"
Here's the Water Test.