Known as the best iPhone 4/4S case for the money, the Magpul iPhone 4/4S
Field Case is the cheapest, most durable case you can get without paying an arm and a leg.
The Magpul Field Case for the iPhone 4/4S is a semi-rigid cover designed to provide basic protection in the field.
Made from a durable thermoplastic, the Field Case features PMAG-style ribs for added grip, snap-on design for easy installation and removal, and slides easily in and out of pockets without snagging.
Specifications and Features:
Compatible with all iPhone 4 and 4S models
Semi rigid thermoplastic elastomer construction provides protection against minor bumps and abrasions
Compact design adds minimal bulk to the phone
Textured surface and PMAG-style ribs for added grip
Raised lip protects screen when laid face down yet remains unobtrusive
Charging cable port, headphone jack, and ringer/silent switch are accessible with case installed (optimized for use with factory charging cable and headphones)