FLA Orthopedic Cervical Collars are made of polyurethane foam and are covered with a soft, beige stockinette. The low contour design will hold the head in a neutral position to facilitate recovery. Choose the width of the collar. A narrow width collar is 2 1/2" wide and a regular width collar is 3 1/4" wide. Sizes range from small to x-large to fit necks measuring 15"-21".