Phone Case have plastic hard shell (PC) which is a mobile phone protective case manufactured using plastic injection molding technology, is mainly made of PC (polycarbonate). The main feature of the product is that it can be made very thin, with a very hard surface, and the surface can also be printed with various patterns. Some products also spray a layer of touch paint on the surface to increase the touch, which is traditionally known as rubber oil, making the feel more delicate and slightly elastic. 

The TPU shell, also known as Thermoplastic Urethane clear water cover, is not an innovation in concept. It is a blend of crystal shell and silicone cover, belonging to a moderately soft and hard phone protection case made of transparent silicone, and because it is as transparent as a crystal shell.