The Spigen Neo Hybrid for iPhone 5S is an assembly-type case with a TPU back cover and a polycarbonate frame. The Neo Hybrid is form-fitted to effectively protect your device from external impact. The iPhone Neo Hybrid is designed to highlight the curves of your device. It fits precisely onto the phone for a natural and sleek look. The Neo Hybrid is a 2 part case that can be dissembled into a TPU back cover and a polycarbonate frame. The Neo Hybrid uses premium TPU material for extra durability. The TPU back cover will not sag or expand due to heat from the device.