Ergonomic design, adjustable armrests, backrest height, seat height and depth, coupled with the SYNCHRO mechanism enable the so-called "dynamic sitting". As a result, the chair meets expectations of those who spend up to over ten hours at their desks.-Ergonomic design, adjustable armrests, backrest height, seat height and depth, coupled with the SYNCHRO mechanism enable the so-called "dynamic sitting". As a result, the chair meets expectations of those who spend up to over ten hours at their desks.