Car Seat Headrest Pillow : The car headrest is suitable for most car seats. When your child or passenger is sleeping in the car, this headrest will help them stay in a healthy and comfortable sleeping position and avoid head/neck/shoulder pain. The seat pillow has passed Calspan safety crash tests to protect the head from hitting the car door window. And received a U.S. patent. Adjustable Headrest : This car pillow supports 360° rotation adjustment. It can be adjusted as much as possible according to height to ensure that it is suitable for children and adults of different heights. When you're not using it, just lift the headrest up for storage - save space. Good Care for Passengers : car seat pillow will comfortably support the head and neck on side, relax the muscles, and prevent floating neck caused by prolonged bending, fatigue, and pain. And protect your head banging on the car door window. Care your families, friends or business partners. Easy to Install : The headrest does not require any tools. You can install it with your child in a few minutes and it will be a fun family craft activity. PS: Please watch the installation video. Important : Please make sure the car seat has a metal rod that can move up and down before purchase. The main lever of the 2 side headrest connection is adjustable from 55mm to 170mm, suitable for most car seats with adjustable height headrest lever. If you have any installation problems or quality problems, please contact us and we will give you a reply within 24 hours. We hope this headrest will help your child or passenger enjoy a long trip to sleep.