The Olive Zügel 1302 Fine Line Flex features a soft, food-grade PU core that provides a warmer feel in the horse's mouth, even in cold weather. A hidden metal core ensures break resistance and safety. The anatomically designed core follows the natural line of the horse's mouth, evenly resting on the tongue and molars, while a slight relief for the tongue reduces pressure. The solid olive rings prevent pinching at the corners of the lips and provide better lateral stability, keeping the reins steadier in the horse's mouth.