The Aeron chair was the first chair to ditch the foam padding in favor of their unique Pellicle woven suspension system which allows the skin to breathe while providing optimal comfort and support. Other mesh office chairs have attempted to replicate Pellicle, but their attempts are mostly inadequate compared to the well over a decade old Aeron. Perhaps the most innovative element of the Aeron is the automatic lower back support which moves with you; this support is known as PostureFit lumbar support. Herman Miller’s patented PostureFit in combination with a truly ergonomic design allows for the user to maintain proper posture even while sitting, something most chairs are not capable of. If you’re looking for the best ergonomic chair ever made, this is quite possible it.
via Fact Based Aeron Chair Review – World of Victorcraft.
Above is an exert from the review I just wrote and published and my Wetpaint account. Definitely give it a read if you find yourself curious as to what all of this Aeron commotion is all about.