Perfect Fit Invisiwire Plush Warming Blanket, Queen, Sand Invisiwire Technology makes wires virtually undetectable while providing even, consistant warmth. Fully machine washable and dryable. Giant Backlit auto-dimming, easy-to-read numbers. 10 Personalized heat settings THE WORLD'S SAFEST Non-Hazardous low voltage uses less than 25 volts. 100% safe even with presence of moisture.