It's All About Choice

1.Use TPU material instead of before silicon material. 
2.The case will be not deform easily.
3.Case with two holder, before one only with one holder
4.Use good quality PC material, not fracture easily when you squeeze it vigorously
5.Use Pearl flannel, will not fade easily, will not make cell phone become dirty, especially white cell phone. 
6.This position use electrophoresis technology, will not get rusty.