Intelligent ergonomic design fits most any user. Sychnro function tilts back in a 2:1 ratio to the seat for a more natural reclining position. Flip-back arms neatly pivot backward and out of the way when not needed. Integrated lumbar support bar for ideal back posture. Breathable mesh back and generously padded mesh seat for all day comfort. Waterfall seat edge reduces pressure points at the back of the knee.