Professional Ergonomic DesignThe TKLoop Car Neck Pillow is designed with professional ergonomics in mind, taking into account the curves of the human neck, shoulders, and back. The product's overall structure is slender with smooth curves that can perfectly fit the human body, providing comfortable support for the neck while not pressing against the back, allowing the body to maintain a relaxed posture while driving. Product Use & Size GuideThe TKLoop Car Headrest is designed to provide comfortable neck support and is compatible with most car seats. It measures 10 inches in width at the bottom, 11 inches at the top, and stands 13.5 inches tall. The groove section measures 5.9 inches in length.To ensure a secure fit, and it can fit a seat headrest up to 15.7 inches long x 5.9 inches wide.We recommend measuring your headrest accurately before purchase to guarantee perfect compatibility. Comfortable MaterialThe TKLoop car neck pillow features a premium lining made of 55D de