Remarkable for style, comfort, and support, Sift guest chairs have all-mesh seats and backs made from SoSoft mesh – a breathable, supple, and incredibly soft woven material. The constant cooling effect of Sift’s mesh ventilation promotes a more comfortable and productive work day. SoSoft mesh has a 10-year warranty and passes KI’s rigorous testing for bursting, tearing, and cleanability. The built-in lumbar mechanism (rare in a guest chair) offers enhanced comfort and constant support. The mechanism adjusts easily from a sitting position. Sift guest chair provides design continuity when used with Sift task chair. It has an integral cantilevered arm and, like the task chair, has been tested to support 300 pounds.