A chair is considered ergonomic when it naturally follows the body in every change of posture. It should "sense" the body's movements, no matter how small or large, and remain stable when the body needs to be stable.
On the Capisco Puls chair, you move your entire body without even thinking about needing to move or correct your sitting position. You can sit low, in a semi-seated position, or almost standing. You can sit straight, sideways, or even turn the chair around with its backrest against your chest.
The philosophy of using a Capisco chair is encapsulated in the phrase: The best posture on the chair is the ... next one.