Humanscale Freedom Task Chair, Graphite Frame, Headrest, Standard Gel Armrests, Standard Seat, Standard Height, Wave Black Fabric Standard Cylinder Provides seat height range that accommodates 90% of the population Moves in the natural arc of head/neck for perfect support through range of recline Position-sensitive headrest moves into place when you recline and out of the way when you sit upright Intelligent counter-balance recline mechanism automatically provides the right amount of support