Breathable Mesh Chest Harness: Made of double mesh fabric with flannel edge, which absorbs sweat and allows skin to breathe when your dog wears it. Elastic Seat Belt: It is made from durable nylon webbing to protect the dog, it is elastic and adjustable for car vehicle. Suitable and humanized design - Breathable mesh harness to relieve the pressure. It is adjustable depending on how much lead you need to hook it into your car’s seat belt. The included seat belt is long enough to allow him to move around in the back seat and lie down. Safety and comfort: the harness wraps around the dog’s body and neck and can be replaced by a collar. The straps tighten securely so dogs can’t move around in the car to prevent dogs from jumping into the front seat, but they don’t pull against them. Easy to use and easy to Quick release—there are four buttons on the harness strap which can be easily adjusted to make your dog friends feel comfortable, which is suitable for small, medium dogs or even