When thinking about task chairs the number one point to consider is comfort. When working at a desk day after day for eight hours a day it is crucial that you and your employees are comfortable. If one is comfortable in his work environment then he is able to work more efficiently.
What to check to be sure the chair is comfortable? You need to be sure the width and depth is a good measurement for you. One wants to be able to change the position he is sitting in and that he should not be cramped. At the same time you want to be sure the chair is not too deep that your knees can not bend when you lean back.
Height is also very important to ensure comfort and ease while working. Proper height ensures that you do not need to strain your neck nor lean on your desk in an uncomfortable way. Again this is important for if you strain your neck it can cause aches and pains which will diminish your work level. Also being in a chair that is too short makes your legs jut out. Either way it is very uncomfortable.
Another thing to check is the back rest. The back will ensure proper support for the neck and back. The back is the moist important part of the body to be sure it is in the proper position, yet it also needs to be cushioned so that it is comfortable as well. Arm rests are one part of task chairs that is not necessary, and many do not come with them. However if you can have a chair with arm rests it is very nice as you are not always working at your computer and you may be in a position that it is nice to rest your arms.
When looking into task chairs the most important features is proper back support and that it is height and depth adjustable. Choosing whether you want arm rests or not is very personal. To find out about other task chair options check out task chairs.org