The Aeron Chair is jam-packed with more "bells and whistles" than most ergonomic office chairs, allowing users to enjoy the sophistication of Herman Miller's classy design. Its many features include:
a pneumatic lift for adjustable height; patented technology to allow the user to naturally pivot at the knees, hips, and ankles simultaneously;
fixed armrests; and an adjustable lumbar pillow that supports the lower back.

This is a new chair, delivered as configured.