This is a chair spring that supports active sitting. The effect is particularly noticeable when working for long hours. The chair spring "follows" the doctor's movements and ensures upright, ergonomically-correct posture. This increases work comfort and relieves strain on the spine. It also keeps the user active and reduces the risk of developing a physical discomfort. The chair spring is designed to maintain good posture, providing better support and health benefits during long periods of sitting.