This product is not certified or tested to protect users against the crushing forces that may be sustained by a horse or other large animal as well as motor cycles and collisions with other vehicles hitting, stepping or smashing on the neck or rolling onto the neck of it's users. If you believe the undertaking a form of riding, such as eventing or jumping, where there can be high likelihood of a crushing event, it is important you realize that this neck collar, is not designed, nor will it protect you against, such crushing events. This neck collar will restrict movement of the head as in whiplash. This product is similar to football neck-rolls. It is designed to only assist in the prevention of cervical injuries. It is the riders duty to be cautious with unpredictable animals or enact responsible behavior when riding anything. Users should contact a qualified doctor prior to riding or using this equipment. Users should also choose a size that fits. Protective equipment is designed to minimize the possibility of injury to persons. Use of this equipment does not guarantee that users will be absolutely protected from injury or serious, disabling, permanent injury or death. Manufacturers advise to wear a helmet as well. Any alteration or modification could reduce the protective capability.