This four pack of Legacy2 Support Boots from Classic Equine are made of 100% virgin perforated neoprene that allows the leg to breathe and the heat to escape so your horses legs stay cooler. A round cut box stiched hook and loop closure with elastic reinforcement makes the boot more secure. The splint pad guards agianst crossfire injuries and allows for a closer, cleaner fit. The suspensory rib is posititioned between the tendon and the cannon bone to ensure proper boot alignment. While the patented Cradle Fetlock System provides maximum support and protection to the lower limbs with a double layer of shock absorbing neoprene. An the extended layer of tough, bulletproof material fitted on the cup area ensures durability with a series of fitting darts to provide a clean, close fit while the bound edges help to keep the dirt and debris out.