[Iterative Upgrade - The headrest support is made of high-quality thickened environmentally friendly ABS fixing the shortcomings of the previous generation easy to bend and easy to break and filled with thickened memory foam for maximum comfort and safety it has also passed rigorous safety inspections in the US. Space saving - Both side headrest pillows can be rotated 180° to adjust the height making them suitable for adults and kids over 3 years old. When not in use simply lift the pillows up to save space.A Perfect Match with Backless Booster Seat for Car Travel Sleeping. Easy Enstallation - No need for a screwdriver! Our pillow can be installed in just three easy steps and we provide clear instructions and video tutorials for your convenience. Universal Fit - Compatible with most car seats that have metal headrest poles and an inside width between 2.75" and 8.26" (7cm--21cm). Please ensure that your car seat has a metal rod that can move up and down before purchasingthis product needs to be used together with metal rods. Professional after-sales team - We always maintain high quality standards for our car headrests and provide professional after-sales support. If you have any demand for our car headrests you can send an email through Amazon and we will provide a satisfactory solution for you.]