Fit, walk, buckle, ride! Coastal's safety crash-tested Easy Rider Adjustable Dog Car Harness keeps dogs safe while traveling in the car and can also be used as a walking harness. Available in five sizes to fit most dogs, this car harness features metal hardware at stress points and has passed independent safety crash testing in accordance with the FMVSS 213 for child restraint systems. Size MED is recommended for dogs with a girth of 20-30".