He reports that the LifeProof is surprisingly lightweight and unobtrusive, and describes the technology it uses to protect all the iPhone ports from water, snow, dirt and shock. Apparently even the speakers work without sounding muffled.
Does the LifeProof really work? See what happened when Steve set his own iPhone 4 to record this video and then submerged it in a sink full of water.
The LifeProof is available for iPhone 4 in black, white, and pink.