This was purchased for my son, but he already has one that he enjoys, so I'm selling it! The back, seat, and armrests of this office chair are all fully adjustable to accommodate a wide range of body types. The arms are designed to give optimal ergonomic placement, and the 2 13/16" ratchet back height adjustment provides superior lumbar support. An adjustable lumbar pad provides additional support to help with the discomfort of sitting for long periods of time. For convenient mobility at work stations, the chair is mounted on a swivel base with five easy-rolling rollers. The seat's breathable, mesh back provides for optimal air flow to keep the user cool, while the durable fabric upholstery is easy to clean and maintain.