If you weigh more than a feather don't buy this chair. Almost immediately after sitting in it for more than a test drive the mesh on the seat of the chair had a pronounced sag. Not a crisis on its own but when that happened the support foam on the front of the chair made unbearable contact on the backside of my legs. I really wanted to like the chair but not nearly as comfortable as it should be. Returning it today after purchasing it yesterday.
I am 83 have several back problems and needed a reading/data entry adjustable home office chair. This one turned out to be the best one yet for long sessions at my portable workstation. I have No Pain and far less fatigue. I got my wife one too.