And let your conscience be at ease as well since HAG H05 chairs are produced with recycled and recyclable materials. The H05 chairs feature only one lever and one wheel to adjust. The H05 chair is not only the best seating solution for providing variation and movement, it is simply brilliant and brilliantly simple. The HAG H05 ergonomic chairs was designed around the “balanced tilt theory” which says that sitting in best ergonomic chair balance is the best starting point for any subsequent movement. The H04 chair has a more traditional design when compared to other HAG chairs, making the chair an excellent choice for the office. With this, the H04 guarantees balance to be the starting point of any movement, facilitating freedom of movement for the user to concentrate on his task.