The Pro Performance Cross Country boot is constructed from RoHS/ REACH compliant German quality BASF TPU which is directly injected into a breathable mesh fabric. The updated PEBAX strike guard is shaped to provide optimum fit on your horses leg. The shaped fetlock area improves fit and features increased hardness and thickness to provide extra protection in the fetlock area. Honeycomb hex pattern allows air to flow in and out of boots. Hypoallergenic,polyolefin foam lining provides a non slip fit that will not retain water or become waterlogged.