Designed to protect from dust, dirt, and spills, the ClearSkin keyboard cover has been perfectly engineered to fit your MacBook Air 11-inch notebook. The ClearSkin keyboard cover is the thinnest, clearest cover we have ever made.And now, it has been specially molded to fit the keys on the MacBook Air 11-inch keyboard.The ClearSkin keyboard cover is made of a 0.1mm advanced space-age plastic, so clear that it is almost invisible when put on the keyboard...and because it is so thin, you can hardly notice it when typing.