This Tough1 cribbing collar is made of heavy oiled harness leather making it both comfortable and durable for your horse. It is designed to apply pressure when the horse attempts to crib and only when cribbing. The contour shape around the jaw helps keep this collar in the correct position to work effectively. When properly fit, this collar with not interfere with your horse's daily activities including eating grain, drinking, and grazing.Not guaranteed to stop a horse's cribbing habit. Consult an equine professional or veterinarian for additional guidance.