Car seat cushions are designed to cradle the buttocks. Hence, they are primarily intended for the use of one person. A bench seat like that in a truck is rather long. You can place individual car seat cushions for each passenger that you have. For example, if you will be seating 2 other individuals beside you, then you will need two seat cushions. Technically, a car seat cushion will fit a truck’s bench seat, just not in the way you may have imagined.