Elastic Buffer Design - The elastic bungee buffer of the dog car seatbelt helps to absorb sudden brake or sharp turn shock perfectly, can protect dogs from sudden brake or sharp turns, preventing driver from distracted driving. Dog Seat Belt are designed to ensure the safety of pets, so that you will not be distracted when driving, travel more at ease, and happier journey. It can comfortably restrict the dog's activities to a considerable degree of freedom without affecting safety, and can make you focus on driving. Comfortable and Fully Adjustable - It takes just seconds to place the strap around a car headrest then secure with easy seat belt style fastener that locks into place. Elastic bungee cord works as a 2-in-1 restraint and leash that fastens to your dog's harness or collar. Not only can it be used as dog car seat belt but also be used as dog leash. Hope this product will bring you and your pet a safe and happy life!