The Professional's Choice Spartan II Bell Boot is made with a high quality TPU shell that is flexible yet protects against impact. The no-turn knob design prevents boot from spinning and the recessed ballistic binding is secure and prevents fraying so these bell boots will last! They are shaped to fit securely over the bulb of the heel for ultimate overreach protection and have a double hook and loop closures keep boots securely in place. The lining is soft and will not rub so your horse will love them too!