Product Name: Car Seat Headrest & Neck Pillow (Black) – for Kids & AdultsFitment - Compatible only with car seats that have metal posts - Post spacing: 5 cm – 20 cmKey Features - Built-in universal hook – hang shopping bags, backpacks, etc. - Dual aroma slots – insert scent pads or charcoal for odor removal - 180° rotation – adapts to children and adults of different heights Width adjustable left/right – won’t block seat belt, keeps neck comfortable - Flip-up design – folds away when not in use to save spaceMaterial & Safety - Shell: high-strength ABS, impact-resistant - Cover: premium breathable leather, wipe-clean - Padding: thick memory foam for soft head & neck supportInstallation & Service - Tool-free setup in about 3 minutes – fun family DIY - Please confirm post spacing before purchase - Installation video and customer support availablePackage Contents - 1 × U-shaped car headrest - 2× memory-foam side supports - 1 × protective cotton pad - 1 × user manual - 4 × installation tools