The full bed coverage of this underblanket will keep you warm and cosy all night long made from a sumptuously soft fleecy fabric it uses ultra thin wires for ultra efficiency heating up ready in just 10 minutes yet you can rest in total confidence thanks to an integrated sleep safe automatic overheat protection shut off system which allows the blanket to be used with complete safety right through until dawn the detachable controller enables it to be conveniently machine washed and tumble