Is proud to offer the fine-tuned H3 and H4 Headrest to enhance your Herman Miller Aeron, elevate your comfort and improve your productivity. From large corporations to home offices, these ergonomic add-ons are a must for every avid Aeron chair owner. Eliminate upper-back, shoulder, and neck pain by adding this headrest to your chair today! 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) COLOR AND WEAVING – Classic Carbon – Color Code 3D01 – The Headrest perfectly matches your Aeron Chair in comfort, quality, color of frame and Mesh and the mesh weaving. Please make sure you choose the right Model and color of your chair, see our images and text for assistance. 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.