The Boyd Martin Elite-Cross Country Hind Boot is critical for cross country. This super strong boot is made with tough, anti-rip TPU material that holds up to the grueling impact of cross country. The Bio foam layer along with perforation throughout make for easy air circulation, which maintains the soft tissue temperature in your horse's leg. a layer of ARTi-LAGE provides flexion as well as excellent protection from impact. Dirt, mud, sweat and debris are quickly removed with just a rinse.