Magic Mat: Apply for various occasions. For example, it works as a built-in bedroom cushion to keep your shoulder and knee warm when you use the computer; and also perfect for using in the vehicle, under the occasion when you read, watch TV, work, you will no longer feel the cold. Feature: Dimension of 45 x 80cm and 150 x 80cm for your choice; Good work for care and reduce pain from cold and wind. Heat quickly: USB method, you can have a heating cover in 4 minutes with the USB charging. (You do not need to separate the USB and its cushion) Washable and removable: Removable cover that is easy to clean. / Tighten button for closing. Convenient to put in the bag and roll up when traveling. Necessary equipment in winter: Warm and soft velvet, thicker and breathable to keep you warm for monthly days and cold days.