A-SYNCHRO mechanism with max. 20° inclination (+5° ÷ -15°) of the backrest and 20° inclination (+10° ÷ -10°) of the seat. The tension of the backrest can be adjusted according to the user’s weight by turning the side handle. Both the seat and the backrest are equipped with an anti-shock system, which allows the backrest and the seat to be easily locked in 5 different positions.