Metro Mesh Office Chair Breathable Mesh Design Structural Fabric support and cools the body for hours of comfortable and energizing use. Armrests are adjustable and can be removed or adjusted out of the way, this is great great because resting your elbows can cause problems with you ulnar nerve. This has the best back support I have seen, like the Herman Miller Aeron but cheaper. Thanks for looking at my ad and good luck! Below is the Picture of the Back, very high quality and just as stable as Herman Miller. Its made by a great company here in the San Francisco Bay Area.