OK is an ergonomic chair, made of plastic, which houses a small cushion in the seat to ensure greater comfort. The saddle seat promotes dynamism in movements: it can be adjusted both in height and in depth, ranging between low and high working positions, up to the upright position. The backrest, adjustable in height and with integrated armrests, facilitates both work at the desk and the rest of the upper body. Ok also allows you to adjust and block the inclination tension of the backrest.