The Original Headrest for The Herman Miller Aeron Chair (H4 for Classic, Carbon). Premium Mesh Headrest – High-quality breathable mesh designed for durability and long-lasting comfort. Choose the Correct Size – H3: Suitable for users under 5’11” (180cm) H4: Suitable for users 5’11” (180cm) and above. Perfect Colour & Mesh Match – Classic Carbon (Code 3D01) engineered to match your Aeron chair’s frame, mesh, and overall design. Ergonomic Support – Designed to support your head and neck, helping improve posture and reduce strain during long sitting hours. Adjustable Free-Floating Design – Features smooth tilt and height adjustments. Lock forward and backward angles for a personalised fit and maximum comfort. We are always working hard to ensure your package arrives as soon as possible. We do not accept PO Boxes. Please provide a physical address. If you have any issues with your order, please contact our customer service before leaving feedback. We’ll respond within 24 hours usually faster! To resolve any problems. Thank you for shopping with us!