Here is another chair that helps you become more active at work and engage your muscles. The SitTight Active Sitting Chair features a minimalist design, comfortable seat, stable base, adjustable air bladder, and customizable height. The chair not only activates your core muscles, it also can help you become more focused at work.
The SitTight chair weighs 39 lb. Its height can be adjusted from 21 to 26 inches. It has a weight rating of 320 lbs.