The Henri de Rivel Advantage Flat Breastplate Martingale with Standing Attachment has a simple, flat design that is suited to the conservative rider. Featuring all leather, it will hold up to years of use and is fully adjustable to suit multiple horses in the barn. This martingale is an appropriate choice for the hunters and equitation. Stainless steel hardware ensures durability and buckles for easy adjustments.the Henri de Rivel label offering you superior leather goods and superior performance at a superior price. riding saddles and leather goods are expertly designed with unmatched craftsmanship and attention to detail.