Ultra Clear and Thin TPU Keyboard Cover for Microsoft Surface Pro 7,Surface Pro 6,Surface Pro 5,Surface Pro 4 About TPU material: TPU is a flexible polymer material and its full name is Thermoplastic Polyurethane. It has been widely used in the medical industry due to it has excellent physical functions, such as flexibility, wear-resistance, strength, hardness, extension and temperature adaptability and so on. TPU keyboard skin is characterized as ultra thin and high transparent, it has very good visibility and not easily caught the dirt. Compared with silicone: TPU keyboard skin is thinner, and with much higher transparency, it feels more like plastic film, non sticky, soft but not stretchy, the thinner it is, the higher the transparency it could be, minimize its affection on your type feeling at the same time protect your keyboard. Note: keep it away with very high temperature items(such as boiled water), or or it may be out of shape. Compatible device: -for Microsoft Surface PRO 7,2019 Released,US Layout -for Microsoft Surface PRO 6,2018 Released,US Layout -for Microsoft Surface PRO 5,2017 Released,US Layout -for Microsoft Surface PRO 4,2016 Released,US Layout Package Content: - 1 x TPU keyboard cover Cleaning instructions? --Apply a generous amount of dish washing detergent on a sponge or keyboard cover, gently scrub the keyboard protector back and forth with the sponge,rinse the bubbles thoroughly with water then dry keyboard protector with tissue paper --During washing,do not wrinkle or fold it. Protection tips? --Clean keyboard area and screen before using the keyboard protector --Use included removable adhesive to hold down the protector where lifting may occur --Customer can use the adhesive freely onto any key or not use it. If use it,suggest use one or two onto the ESC/END keys