Brand: Edison Brain Features: Adjustable Color: Black Size: Free Material: Air Shape: Semicircular 【Your Own Pillow in the Car!】This model allows for rotation of the cushion and vertical adjustment of the cushion part! The left and right sides can be adjusted from 16cm to 28cm, allowing you to freely adjust the angle and position according to your height, sitting height, and shoulder width. When not in use, you can flip it up to store it without obstructing your view. 【Turn Car Travel Time into the Ultimate Relaxation Space】Have you ever experienced neck pain after sleeping in the car? A bad neck angle during sleep can actually cause fatigue. By using our headrest cushion, you can improve the quality of your sleep and enjoy a relaxing travel time. 【Compatible Vehicles】Installs on the headrest stay (support post) without tools. It can be installed on vehicles with a stay width of 7.5cm to 19.5cm. Even women can easily attach and detach it. 【How to Install】1. Remove the headrest from the seat. 2. Adjust the width of the slide bar on the mounting part to the headrest stay and attach it. 3. Insert the cushion into the mounting part and attach the headrest to the seat to complete the installation. *If the headrest stay posts are thin, use the appropriate size adjuster to adjust. 【Product Specifications】Material: PU leather x high-resilience urethane foam. Set Contents: Headrest mounting part x 1, Cushion part x 2, Adjusters (2 types) x 2