This seatbelt shoulder pad has been so helpful during trips in the car. I've used it in the front passenger seat and my 6 year old son uas used it in the hacvk seat. It works well for children and adult alike. This pullow slides easily up and down the seatbelt cross over shoulder strap and totally supports my head. It is so soft and easy to wash. I like that this product is user-friendly and make naps much easier in a vehicle while also following the seatbelt laws.