A high backrest with a large capacity and a complete lateral curvature of the lumbar spine by keeping the disks back and shoulders and facilitates a better focus on the seat;

Backrest working chair TERTIO are height-adjustable rack system by automatic Up-Down integrated into the T fixing.

Sitting in the seat, lift the file. It rises notch by notch. At the top, it goes down alone to the lowest position and you can start.