The Medium 2″ REV is made for average size drivers that only utilize 2″ wide shoulder harnesses, and want to take advantage of the ability to keep a narrow shoulder package. Works ONLY with 2″ shoulder harnesses and fits drivers with necks between 5″ and  6″ comfortably. Includes quick release helmet hardware, carry case, tool kit, decals, and a bonus Flexfit™ brand hat

For sizing information, see link at the top of the page.