One tether to secure your dog to your car's seatbelt is already included with many of Kurgo's car safety and active harnesses. However, after a number of customer requests, Kurgo has made extra tethers available for sale separately with the Kurgo Dog Seat Belt Pet Safety Tether with Carabiner. This tether is perfect for the dog owner with more than one vehicle who wants to leave the tethers in place. It's ideal for dogs of all life stages, including Small, Medium, Large and Extra-Large breeds.