Sigma Executive Mesh Back Office Chair Bespoke Fabric Seat Ginseng Chilli With Folding Arms - KCUP2025 DDThere once was a time when operator seating was dull, uninspired and simply boring, that time is over one glance at the Sigma and you will understand why. Breathable mesh adorns the backrest that serves as a stylish centre for the folding arms and adjustable headrest that the Sigma proudly parades.