What is a synchro-tilt mechanism on an office chair?

A synchro-tilt mechanism links the backrest and seat so that when you recline, the seat tilts at a lower ratio (2:1 or 3:1) than the back — keeping thighs relatively level and maintaining a comfortable hip angle. Synchro-tilt is standard on mid-range to premium commercial chairs. FindOfficeFurniture.com chair specs note the tilt mechanism type — call 888-719-4960.