The Swede-O Thermal Vent Lumbar Support provides comfortable support, compression, and heat therapy to help relieve low back pain as well as help reduce symptoms of sacroiliac joint dysfunction. The flexible internal stays provide support and stability as well as help prevent the sides from rolling. The adjustable elastic side straps provide extra compression as needed. The anatomical form contours to the natural shape of the back and the material is soft and comfortable against the skin.