Hardcore recreational protection for the iPhone 4/4S is the mission for the TAT7 iPhone Scuba Case. The shock-resistant high density polycarbonate case with stainless steel buttons keeps iPhones safe from sand and snow, and is waterproof to 100m/30′, a depth that covers the majority of colourful underwater life and the limits of available light (signals get lost by 100′ as well). $84.95 and available direct.