Sure-Fit does what others cannot. Sure-Fit properly positions a shoulder belt while allowing the lap belt to remain in its correct place - snug across the child's hips. With its unique design and attachment location, Sure-Fit provides a natural seat belt fit that is both comfortable and correct. Flexible, lightweight and extremely comfortable, Sure-Fit attaches in seconds without using snaps or buckles to secure the shoulder belt. Thoroughly crash tested, it is incredibly strong. This is how a seat belt should fit.