If your heated underblanket leaves uncomfortable cold areas and draughts you need this full mattress sized blanket sized to fit almost to the edge of your mattress it will ensure night long warmth and comfort with three heat settings and a convenient pre heat function the detachable controller allows it to be machine washed and tumble dried made from soft polyester it is fully reversible and with a patented beurer sleep safe system its perfectly suitable for all night usetie down fitti