Very nice product. I use it for my Maltese.  It is his car seat to go back and forth to work daily.  It has a harness inside to connect to your pets harness vest or collar to keep them in the seat.  The backside offers a place to run your seatbelt through to secure it in the seat of the car.  It is lightweight and easy to move around if you want to change your pets seat in the car.  Only thing that could be better is that it could be a little better structured to secure your pet safely in the seat.  But definitely better than just having them free sitting in the car.  I would buy another one for my husbands car.