Here is an updated version of an ergonomic task chair that offers all the benefits of a full-blown office chair. First and probably most importantly, the chair offers passive lumbar support when sitting. The seat has thick heavy-duty foam for additional comfort. The chair arms are also padded to prevent shoulder and arm fatigue and can be raised out of the way when you need to pull up close to your work. With the use of a single lever, the chair can be raised and lowered, the seat can be locked or unlocked to tilt freely. There is an easy-to-access knob to set the tilt tension to each individual's preference. The seat rotates 360 degrees and chrome steel feet with 5 dual-wheel casters roll smoothly.