do not by!!!! it is so smallThe seat belt buckle would not come through the smaller end to buckle- the opening was too small.Love that it keeps the shoulder strap from sliding up & choking me, but, am extremely disappointed in the quality. Only have it for 2 weeks & it's the fabric has come out of the binding & is fraying. Also, at one end the binding is coming offused it once or twice, my daughter complained how hard to use the seat belts across it, and how unconfortable it was. Then it was put into storage till now.IT WORKS !!I really wanted my kids to love these but they were too much of a pain to put on and they didn't like the way they felt. Maybe I wasn't doing it right but there weren't instructions with them so I did what the picture showed.This seems to be the best option on the market. Easily moves within vehicles and keeps belt off of g-kids neck.Works wonderfully! My son was always trying to put the chest strap behind him, now there is no need and he is safe with the seatbelt positioned in a safe and proper position.