Kentucky Horsewear's Bamboo Shield Tendon Boots feature a robust TPU shell with multiple ventilation holes and the Bamboo Shield in the tendon area to prevent penetration. Designed with a soft natural rubber piece where the horse flexes, and an extra TPU layer on the inside for high abrasion resistance, these boots undergo rigorous testing, including an 80N of force impact test, making them stand up to extreme conditions. 
Details:

RICOTEST approved and RCT certified
Anatomically shaped 
3D Spacer lining
Machine washable at 30°C(86°F) in wash bag