1、material. The ultra-thin design is only 0.8mm thick. 2、it won't break easily,The hard material and drop proof shell and have good shock absorption, protects your Earphone protective cover from unnecessary bumps, dents and scratches. 3、Is becoming popular, you don't have to worry about the pattern will fade, very easy to wipe, keep clean. 4、perfectly matches with your Earphone protective cover shape and fits it well,snugly but not excessively tight.