Fellowes Heat and Soothe Back Support helps to give you a personalized workspace with comfort via temperature control and back support. Gel lumbar pack conforms to individual users for flexible back support. Gel pack heats up in microwave or chills in refrigerator. Slim profile with soft touch fabric enhances personal comfort. Features hot\/cold icon stitching in contrasting color. Adjustable strap with buckle fits most modern office chairs.