The PetBuckle Seat Belt Harness provides protection for a dog in a standard vehicle by using the vehicle"s seat belt, LATCH bar system or cargo area to securely restrain a harnessed dog. Just slip the seat belt through the web loop on the harness and buckle up. The harness is also designed for use with the PetBuckle Kwik-Connect Tether. Easy to Use One of the easiest harnesses to put on, adjust, and remove. Durable Design Features automotive quality buckles, latches and adjusters Comfortable for Dogs Designed to minimize the potential for choking Small Breed: Fits dogs 20 pounds or less (There are some extrememly small dogs that will not fit into PetBuckle products)