This modernized task chair provides the support and versatility needed for today's multimodal, high-energy classroom or office. The waterfall edge and ergonomic back of the new polypropylene shell promote circulation and support while the top and bottom openings make carrying easy. The sturdy 5-star base swivels 360 degrees and pneumatically adjusts in height. Available in six classic colors and six subtle, modern new choices. Height selections include a 14 3/8"-16 7/8"version or a 17 3/4 to 22 3/4" version, both available with A+ extra wide seating providing 30% more seat space than the A shell.