LUXURY QUALITY AND 2 HEAT SETTINGS: Our luxury quality blanket features bed ties to secure to your double sized mattress, auto overheat protection and a choice of 2 heat settings (high or low) adjustable with the attached controller. The super soft polyester and large size is great for getting cosy and can even help to sooth aching joints/muscles and reduce dust mites. SUPER SOFT: Made from 450gsm polyester, the super soft material gives you a smooth surface to sleep on and allows you to safely warm up on cold winter nights. Adjust the temperature to meet your needs with the simple to use controller. DOUBLE SIZED: Durable, soft and comfortable, the 120 x 107cm underblanket fits nicely on to a double sized mattress and can be secured with the included bed loops and ties. Please note, the Staywarm Double Sized Luxury Quality Underblanket is not designed to fit edge to edge on the mattress. SAFE FOR ALL NIGHT USE: On the lowest setting the underblanket can be kept switched on to maintain a warm bed throughout the night, or alternatively, can be pre-heated on high for 1-3 hours prior to going to bed. Overheat protection is built-in to automatically shut down if too much heat is detected as an added safety feature. Conforms to EN standards. MACHINE WASHABLE: Suitable for machine washing at 30°C on a wool programme, simply unplug the detachable cord and controller. Once clean leave to air on a clothes line and always ensure the product is fully dry before using again.