Dr. Grossos Back Pain Relief Belt is the custom lumbar support that you wear for long-lasting comfort and all-day relief for your painful, aching back. The secret is the hidden pump that inflates the belt to the perfect amount of support and cushioning. Take it anywhere - Dr. Grossos Back Relief Belt will make any chair your favorite. For extra soothing relief, slip the reusable hot-cold gel packs inside the belt. Can be worn under clothing. One size fits most. Measures 57in L x 5.5in W.