The Sunbeam® AdvancedHeat™ Heating Pad features Sunbeam’s most advanced heat therapy for the treatment of TOUGH pain that includes exclusive Advanced Heat Technology: dual layers of proprietary material that penetrate heat 2x deeper, 2x faster to the source of the pain for more effective pain relief.****As compared to Sunbeam XpressHeat Advanced Heat Technology: For the treatment of tough muscle and joint pain; penetrates 2x deeper and 2x faster to the source of the pain for more effective relief** Innovative Design: Dual-layered system features Graphene material—a highly conductive, honeycomb-print material that helps to concentrate the heat and aid in deeper penetration Clinically Proven: Heat is clinically proven to relieve pain associated with muscle tension and stress High-Level Heat that you feel in seconds: Heat increases blood flow to the source of the pain to accelerate tissue healing. Machine Washable 12"X15” Standard Size Warranty: 3-Year Limited Warranty **As compared to Sunbeam XpressHeat