CaseBuy Premium Ultra Thin TPU Keyboard Cover for Microsoft Surface Laptop 2 & Surface Book 3 / 2 13.5 15 inch Why choose TPU keyboard cover? 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.Compatible Models List: ? Microsoft Surface Laptop 2 (Released 2018) ? Microsoft Surface Laptop (Released 2017) ? 2020 - 2018 Microsoft Surface Book, Surface Book 3/2 13.5" ? 2020/2018/2017 Microsoft Surface Book 15" NOT Compatible Models List:? Microsoft Surface Laptop 3 13.5 (Released 2019) ? Microsoft Surface Pro 2018/2017, Surface Pro 4, Surface Pro 5 DO check your "Enter" key to make sure it is the same rectangle as other keys. Package included: 1 x clear TPU keyboard cvoer Note: 1. To keep keyboard cover beauty as new and keep the screen clean, we suggest cleaning the keyboard cover per 7 days. 2. TPU keyboard cover in the cleaning process can not be folded, pleasae keep it flat with both hands gently scrub, rinse the bubble, then wipe dry it with paper tissue. 3. There is a sticker paper inside of the packaging, it can be used freely.If you need to remove the computer frequently, suggest you use one or two onto the ESC/END keys.