These contoured lumbar supports have all the benefits of the regular lumbar supports with a contour shape to hug the back, All the lumbar supports include an adjustable strap for easy attachment to user"s chair or car seat, Contoured lumbar supports have all the benefits of the regualar lumbar supports but offer a coutour shape to hug the back, Coutoured molded viscoelastic foam, Adjustable strap for chair or car, SKU: JBR045