When the weather outside is frightful, a heated blanket can be delightful. Heated blankets can keep you warm in your car on a cold day. The key to using a heated blanket in a car is to make sure it is well-secured so it does not slide around.To use a heated blanket in a car, you will need:A heated blanketA carA seat beltThe first step is to put the heated blanket in the car. Make sure it is well-secured so it does not slide around. The best way to do this is to put it on the back seat and buckle it in. If you are using a smaller blanket, you may be able to put it on the front seat.Next, put on your seat belt and turn on the heater. Make sure the heat is turned up high enough that the blanket will be warm. You may also want to set the fan on high to help circulate the air. Once you are comfortable, enjoy your warm ride!