A seat that adjusts for both the height and tilt, A seat that does not put pressure on the back of thighs or knees (to prevent poor blood circulation), A seat with a front edge that curves towards the floor, Breathable, non-slippery fabric on the seat and back rest, A backrest shaped to support the lower back, A stable five-point castor wheel base, A swivel mechanism, Armrests that can be adjusted to the elbow height when your upper arms are hanging down and your forearms are at about a 90 degree angle to the upper arms, Armrests that do not interfere with free movements within the workstation.