A harness is great for walking and hiking with your dog. A Harness is not designed or constructed to protect your dog during an emergency. We build a premium quality seat belt custom built for superior fit and function. No one would ever purchase a Safety Product thinking that this product could actually hurt their dog or worse... Unfortunately, this happens everyday day. Big Dog Seat Belts are designed for use with any vehicle equipped with OEM Seat Belts. Automobiles, Trucks, Boats, Airplanes and OHVs