A case for an iPhone 4 is about as simple as a device can be and there is a seemingly infinite number of choices to suit one's own needs and style. I was happy to find that Magpul is one of those choices. Magpul is committed to keeping their design and manufacturing in the United States. Like all their products, the Field Case is made in the U.S.A. (and retails for $9.95).
Field Case for iPhone 4/4S is one of three styles offered by Magpul. The others are a version for the iPhone 3G/3GS and the Executive Field Case for iPhone 4/4S. It's a one-piece sleeve made from the same material as the Original Magpul device. It comes in six colors - Black, OD Green, Tan, Foliage, Orange and pink - but it might be difficult to find some colors, like pink. Mine is OD Green.
Like most iPhone cases, it just snaps on the back. It's very easy to install, but hard to remove. There's a little lip that catches over the edge of the phone's metal frame, preventing it from slipping off. That, and the semi-rigid material make it fit snugly and securely. It has a look that is consistent with Magpul's overall aesthetic. It is designed after the PMAG. It works well with the rest of my gear.
The Magpul Field Case isn't fancy, but it does what it's supposed to do, and well. That's how all of Magpul's stuff is - simple, functional and durable. That's what it's all about.