The Boyd Martin TPU Hyperflex Foam/Snap Closure Tendon Jump Boot is built for high level competition and training. The outter surface is hard TPU shell for impact protection from fences with dual density strike gaurd. When impact is made, ARTi-LAGE foam dissipates the concussion made and will not reach the horse at full strength if at all. These boots feature strategically placed cooling vents for maintaining proper functioning temperature for tendons and ligaments. Biofoam molds to your horse’s leg for a precise fit and undeniable comfort. The inner foam has an extra layer of impact protection as well. These jump boots feature nickel plated closures.