We print these using a sublimation process onto the white surface. Car coasters are made of neoprene, 6mm thick with a black bottom and polyester white top. Sold as a set of 2. Material similar to a mousepad All custom designs, requests are welcome. Previews for custom items will be provided for approval prior to a completed item being shipped. These are printed and pressed by hand and will be mailed out within three days of placing your order.