The Hyken Mesh Task Chair is the worst office chair I have ever purchased and I'm sorry I ever recommended to friends. For almost 2 years to the date that chair has given me nothing but misery. The seat was too hard (even with tension adjusted) and it cut my circulation making my legs and feet swell. I couldn't do any work for more that a few minutes at a time. It was like an underwire bra for the body...misery. Even the person I recommended it to don't use the chair anymore. I simply gave mines away last week because I couldn't take it anymore. I sorry I'm just telling the truth. I just wish I could get me money back.