Alera EB-E Series Swivel/Tilt Mid-Back Mesh Chair, Supports Up to 275 lb, 18.11" to 22.04" Seat Height, BlackAdjustable chair with flip back arms that pivot back and out of the way when not needed. Constructed with a breathable mesh back and generously padded seat for all day comfort. Built in mesh armrests are padded for extra comfort. The waterfall seat edge reduces pressure points at the back of the knee. Thoughtfully designed with integrated lumbar support that helps reduce neck and back strain.