Dr. Grosso's Back 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. Grosso's 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. 57"Lx5-1/2"W.Your air adjustable Back Relief Belt provides you with custom Lumbar support when you need it. With just a few simple pumps you can create the perfect amount of support and cushion, wherever you sit, guaranteed! It's perfect for travel, providing support and soothing relief. Your Back Belt comes with freezer and microwave-safe hot/cold packs for soothing relief. You'll also receive Dr. Grosso's booklet, Guide to a Pain-Free Back.