Our serpentine collar has additional contouring which provides improved fit and comfort. This medium density foam collar is covered with synthetic stockinette. The XF version is stitched along its edges to ensure additional rigidity and positioning. Easy application is accomplished with Velcro® closures. Available in 3, 3 3/4 and 4 1/4 inch heights and may be ordered with an extra cover (740-C). Conveniently place your order on line.