The cover panels of the Smart Keyboard are composed of three materials. Just like the Smart Cover, the top layer is made of durable custom woven polyurethane fabric. The fabric also provides the spring-like tension for each key, eliminating the need for conventional mechanisms. The bottom layer is a soft microfiber lining, which protects the screen and keeps it clean when the Smart Keyboard is folded. The middle layer is what makes the Smart Keyboard truly advanced. It’s composed of a new conductive fabric material that ensures seamless communication between iPad Pro and the Smart Keyboard. Its top layer is crafted from a sheet of highly durable custom-woven fabric that’s laser ablated to form the shape of each key.