 The rein system of the hackamore is called the mecate.The mecate ( or ) is a long rope, traditionally of horsehair, approximately 20–25 feet long, tied to the bosal in a specialized manner that adjusts the fit of the bosal around the muzzle of the horse, and creates both a looped rein and a long free end that can be used for a number of purposes.When a rider is mounted, the free end is coiled and attached to the saddle.