(Note: Harness only, no seat belt.) Keep your dog safe and comfortable - The strap wraps around the dog's body and neck, which could be instead of a collar. The straps are adjustable to fit the dog's neck and chest circumference. The dog harness provides good overall control of the dog during walks, the padded design inside provides more comfort and ventilation, so the air can easily flow in and out. The chest strap is made of a soft material layer.