Have a friend that works in a LandFill (CAT Loader), he's looking for something thats dust/rain resistant mostly dust resistant. He currently has a otter box defender but is having issues with dirt getting inside the phone through the cracks, etc. Anyone have any good recommendations ? Also if you can and use that particular case post photos. He was asking me if the LifeProof was worth the $, i haven't never used them so i thought i would ask you guys.