You are watching your horse frolic through the field, playing and loving the warmth of its new blanket, and then, it falls off. You walk over and pick it up, and see that nothing is wrong with the blanket, so why did it fall off? Weatherbeeta® makes these rubber surcingle stoppers to prevent the surcingle buckles from coming loose while the horse is moving around. They are simple and inexpensive way to ensure that the blanket stays on.