Pros: water sealed, durable construction
It can be difficult to find a good case for your iPhone - especially for the outdoor enthusiast prone to use his/her phone in adverse conditions. If your prone to dropping your phone, getting it wet, etc. you need to get your hands on a LifeProof case. With a solid, water sealed construction (seriously, I've seen these things left in tanks of water for extended periods), LifeProof cases are ready for any ski trip or adventure. A heavy duty case obviously comes with some extra bulk, but the extra protection will surely come in hand when you drop it getting off of the chairlift.