Providing the latest in ergonomic seating the ava is the perfect choice for comfort whilst working the contoured waterfall seat edge reduces pressure on the lower half of your body and the adjustable backrest creates a comfortable seated position strong swivel castor wheels ensure maximum mobility around the office complemented by the sturdy 5 star base faux leather seat black base 1d adjustable arms height adjustable 3 lever system 8 hours use back adjustment back height adjustment