Sigma Executive Mesh Chair With Folding ArmsSigma Executive Mesh Chair With Folding Arms There 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. Make it Personal: Personalise the Sigma with an array of bespoke fabric options. Eye Catching Design: The