This is my third iPhone4 case, and I think it will be my last. This is a very stylish case that is functional, too. The clear plastic section is a hard plastic, and the hot pink is TPU material. The sides are knurled (has ridges/grooves) to provide a better grip for holding the phone. This was a pleasant surprise when I held the phone for the first time. I think that is my favorite feature of this case since I tend to have to hold the phone in one hand and dial or text with the same hand, while holding a child in the opposite arm.