TUDIA Heavy-Duty Extreme Case ($11)
One of my favorite brands lately is TUDIA. The company always has precision molded cases that fit like a glove. Better yet, the buttons are always easy to press and work great, which is often a problem with cheap 3rd party cases.
The TUDIA Heavy-Duty Extreme offers some of the most durability, without being too bulky either. This is done by using a dual layer design, which is popular for cases.
This has a soft TPU inner shell for drop protection and ease of use. The big thing though is the outside is then covered in an even more durable hard shell polycarbonate plastic. Making it feel good, look good, and resist the hardest of bumps and drops.
Get it on Amazon for $10.90 in four colors