Most popular in the jumper ring, the Henri de Rivel Advantage Flat Running Martingales are high quality and easy to attach. The Flat leather style caters to the conservative equestrian with a plain style. Running martingales encourage flexion at the poll, while allowing free head motion. They are crafted in color choices to match the rest of your tack as well as with stainless steel hardware for longevity and durability. The Henri de Rivel Advantage Flat Running Martingales are part of the Henri de Rivel line of English saddles and bridles. The Henri de Rivel line of English tack is known for European design and quality at prices that offer great value. Havana, Australian Nut, and Oakbark.