Solve Series Mesh Back Task Chair, Supports Up to 300 lb, 18" to 23" Seat Height, Bittersweet Seat, Fog Back, Black BaseThe synchronized seat and back move in harmony with the user to provide continuous comfort. Seat glide adjustment moves the seat cushion forward or back to adapt to upper leg length. Waterfall seat edge promotes leg circulation. Height and width adjustable arms for upper body support. The unique ilira stretch mesh material moves in four directions to provide responsive, multi directional support for your lumbar. Note: This is a non returnable item.