ComfortPlus floor warming system from Warmly Yours is used under area rugs. The system uses radiant technology and measures less than 1/4”-thick, including the integrated non-slip pad. Designed to deliver up to 75 sq. feet of warmth, the system is offered in sizes: small - 3’6” x 4’6”; medium - 4’9” x 7’9”; and large - 7’9” x 9’9”. For details, circle 212 on the Reader Inquiry Card.