Collegiate Running Martingale The Collegiate Running Martingale is made from the finest quality European leather with highly polished stainless steel fittings for durability. This running martingale splits into two straps from the neck strap with a stainless steel ring on each side for the reins to easily pass through. There is an adjustable neck strap and girth loop for a comfortable fit. > Leather running martingale > Highly polished stainless steel fittings > Adjustable neck strap and girth loop > Quality European leather