My grandchildren tend to fall asleep when we travel. This pillow helps the child to lean over and support their neck when they are asleep. The protector has a long Velcro strip on the back. On the inside is a pouch for the pillow which can be removed. The protector does nott work well on the seat belt if you remove the pillow since it will slide down the seat belt instead of staying in place.
The seat belt pillow works great, but I only use it when I am traveling and think they will fall asleep since it is thick. I love the gray color which matches my seats!