Sunbeam SlumberRest (King Size) CranberrySoft 20% Cotton - Heated Electric Warming Heating Blanket View Easy Backlit DUAL Digital Controllers Smart Technology - Thermofine Warming System - Senses and Adjusts, to send warmth when and where you need it most. Luxurious Easy Care Fabric 20% Soft Cotton-70% Acrylic-10% Polyester. 10 Hour Auto-Off Safety and Power Saving Feature. Preheat Feature Warms up Cold Sheets before Bedtime.