. Environmentally friendly materials， endowed with flexible， thin flexible， wear durability

. Material itself toughness is very good， not easily deformed and difficult to aging and difficult to crack， effectively shock and absorb the impact force

. Finely polished surface to make it smooth， flat and endowed with shiny， easier to clean， simple and refreshing

. Internal waterproof seal bump， fitting no watermark， set aside each function key hole