Clinically proven heat relieves pain (Associated with muscle tension and stress). Feel the heat in 30 seconds. 6 heat settings. Optional 2 hour auto-off. Flexible, plush fabric heating pad. Pain Relief: Soothing heat therapy for common muscle and joint pain. Fast Heat Technology: Feel the heat in 30 seconds. Includes a heat meter that gradually glows to indicate progress as the pad heats up. Extra Heat Coverage (Compared to standard heating pads): Extra long, flexible pad for more coverage on large muscle groups. Easy Care: Machine washable pad. The Science Behind Heat Therapy: Clinically Proven: Heat is clinically proven to relieve pain (Associated with muscle tension and stress). High Level Heat: Heat increases blood flow to the source of the pain which accelerates tissue healing. Moist Heat Option: Spray fabric with water for deep, penetrating pain relief. Due to continuing product development, product inside may look slightly different. For household use only.