Probably the most damage that can be done to an iPhone in a single drop is the dreaded corner impact. A corner crash could mean a small scratch, or the complete destruction of the entire screen, plus possibly more. Ballistic’s Tough Jacket has reinforced corners to protect from the annihilating affects of a corner drop.
The case is made from sturdy material with multiple layers for added protection. The base of the case is built on impact-resistant polymer. The shell is covered by a silicon overlay for extra protection and grip. The overlay is designed with added grip support so you are less likely to let your iPhone 6 slip out of your hands.
All buttons are covered to protect from debris. The back-facing camera is exposed so you can take pictures without obstruction.
The corners are reinforced with shock absorbing material and the case is certified to protect against drops from up to six feet. The front of the case has a raised lip to keep your screen from touching anything on flat surfaces.
All of this, and it is relatively thin for a rugged case. You can still fit it in your pocket, unless you have particularly skinny pockets.