Many iPhone owners like the feel of the iPhone's uncovered aluminum exterior but want some kind of protection. Meet the Metro Case which protects the four edges with a matching industrial aluminum 'guard rail.' All buttons are accessible yet prevent you from accidentally pushing them.
It comes in a choice of matching colors of the iPhone 6, 6s, 6 Plus, and 6s Plus.
If you are nervous about protruding sharp objects (like a gravel driveway) scratching the front or back of your iphone, companies like mediadevil offer transparent protectors available such as a tempered glass screen protector or transparent back protector.
With some iPhone cases, I have trouble getting the iPhone out of my pocket. I noticed the Metro Case it slides out of my pocket easily. However, it could easily fall out of some pockets, too. Consequently, my favorite "iPhone pants" are the Guide Pants and Guide Shorts from Eddie Bauer with flush zippered cargo pockets.