The straps are 1″ wide and adjustable from 31″ long downwards to give your dog some space to relax or tighten them up for limited movement. They are embroidered on one side and the other side has a decorative ribbon and they can be personalized any way you’d like. One end snaps into your car’s existing seatbelt and the opposite end is a swivel hook to attach to a harness. For the safety of your dog, you must attach the swivel hook to a harness as opposed to a dog collar. A harness will keep the dog safely secured in the backseat of the car for a road trip!