The Aspen Contour LSO Back Panel fits patients of all sizes and medical conditions. When you tighten the back brace, the QuikDraw back panel conforms to your lordosis to provide correct structural support. The brace comes with two back panels in different sizes. One is 15 inches and the other is 12 inches in height. The brace is compatible with the Aspen Contour LSO Complete Back Brace.