Some tilt the pelvic area forward to encourage the natural curve of the spinal column. In this category there are so many variations of the basic design. But after awhile, putting all that attention on sitting can take it's toll on our comfort. There are different lines of orthopedic models, too. For many of us we make our living sitting on our bottoms.

Working behind a desk or counter is a classic way of life for many professionals. The first is the classic, simple padding that you sit on and it provides a little extra clearance between you and what you're sitting on.

Others are manufactured with denser foam that raises the tail hershel off of the chair and keeps you comfortable longer. When you talk about these devices there are many images that come to mind. Others may contain feathers for softness, or have air pockets indented throughout to allow more air flow. This can especially be appreciated when you are sitting on a wooden or leather chair. Some come with just a foam insert. That's why having an office chair cushion is a great way to make the work place more tolerable.

The second most com design incorporates various features to add to the original form.