concept

The concept is simple: you can achieve the best sitting posture by identifying one key bone in the spine (the keystone vertebra) and supporting it. The level of this vertebra differs between individuals, and also with the height of the seat.

Despite the multitude of existing chair types offered in the market today, persistent back and neck pain at work continues to be a significant problem. The reason? A misconception in chair design that lumbar support alone ensures optimal sitting posture. This misses the keystone vertebra: the spine is unbalanced and the body collapses down with gravity.

The ephgrave chair offers the solution. Using a single moveable cushion that can be positioned at the keystone for each individual, the spine is supported and the body is balanced. Pain is alleviated and stiffness is gradually reversed, freeing the body to move with greater efficiency.