What does 4D mean for armrests on an ergonomic chair?

4D armrests adjust in four directions: height, width, depth (forward/back), and pivot angle, giving you the most precise elbow support for any task position. Standard 2D armrests only go up and down, while 3D adds width adjustment. If you switch between typing, writing, and using a mouse throughout the day, 4D arms eliminate the awkward reaching and shoulder strain that fixed arms create. FindOfficeFurniture.com carries ergonomic chairs with 2D, 3D, and 4D armrests at competitive prices — call 888-719-4960 to find the right fit.