Aerodynamic design, Midback or highback, 2 frame color choices, Adjustable lumbar support, 10 bleach cleanable mesh back colors, Contrast stitching in 10 thread colors, Enhanced synchro with swivel tilt, Waterfall seat, 3 arm types with textured arm pads, Optional seat depth adjustment, Black, fog or polished aluminum base, 300 lb. weight capacity, Lifetime Warranty; 12-Years for 24/7 use