Please be sure to select the correct’Size’. H3 – For individuals under 5’11” (Under 180cm) H4 – For individuals 5’11” or taller (Over 180cm). MINERAL COLOR – Color Code 23101 – Perfectly matches your Remastered Aeron Chair in comfort, quality, and color, with complementary Mineral Mesh. [MATCHES REMASTERED AERON CHAIR MODELS YEAR 2016 OR OLDER]. Headrest only; chair not included. ERGONOMIC DESIGN – Provides head and neck support to help maintain comfort and alignment during long sitting sessions. Designed for ergonomic performance. Free-Floating System – Tilt and height adjustments move freely. Forward and backward angles can be locked for a custom fit and lasting comfort. Avoid unnecessary pain and increase your productivity. The video showcases the product in use. The video guides you through product setup. The video compares multiple products. The video shows the product being unpacked. Align your life with Engineered Now. Do you spend long hours sitting in your Aeron chair? Watch your posture, avoid neck and back pain, and improve your comfort with the original headrest for the Herman Miller Aeron chair. Improve productivity by working from home or in the office. Does Engineered Now include the Herman Miller Aeron chair? No, we only sell the headrest specially adapted to this chair model. Does it fit all sizes of the Aeron chair? Yes, Engineered Now headrests fit all sizes of the Herman Miller Aeron: A, B and C. If you have “A” size, you will find a special pin included in the accessories that come with your order that is shorter and ensures that the headrest fits perfectly. Which should I choose, the H3, the H4 or the HW? If you are less than 1.8m tall, choose the H3, if taller, the H4 or meet our one-size fits all wide headrest – the HW for Onyx color chairs. If you regularly use headband headphones, choose HW, the special wide headrest. What happens if I choose the wrong headrest? You have a 30-day return period from the time you receive your order. Is the Engineered Now headrest easy to install? Yes, it comes with everything you need and installs in minutes: Begin by placing the headrest at the narrowest point and gently slide it towards the center of the chair. Check to make sure of your positioning and tighten the bolt at its base. Comes with everything you need and installs in minutes.