The Pro Performance Elite Cross Country boots feature the upgrades you need! An improved Pebax strike guard, now shaped to provide optimum fit to your horses leg. The shaped fetlock area improves fit and features increased hardness and thickness for extra protection.... (read more) An improved cut reduces slipping. The outer layer of the boot is constructed from RoHS/REACH compliant German quality BASF TPU, making it extremely durable. The TPU is injected into the mesh base in a honeycomb hex pattern, natures strongest natural shape, which also allows for airflow both in and out of the boots. The lining is a perforated hypoallergenic polyolefin foam lining for a nonslip fit and maximized airflow. These boots will not retain water!