Twice as thick as an underblanket. Deep quilted bounce back for maximum comfort. Heat and comfort all in one. 100% luxury quilted printed polyester. Gives extra support and cushioning to the mattress. Easy fit on the bed in seconds, ruck proof - lies flat on the bed, no tie tapes required. 9 heat settings including pre-heat. Overheat protection system. User friendly detachable dual controls, illuminated. Suitable for all night use. Ultra thin wires. Reusable storage bag. Machine washable at 40C and tumble dryer safe. BEAB approved. Size 150 x 140cm/59 x 55in. Manufacturer's 3 year guarantee.