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Features of a quality ergonomic chair:
* Steel frame construction is the foundation for the longest lasting and most durable chairs. Automotive inspired designs provide the best overall support and must be strong to pass government safety standards.
* Firm backrest design with angle adjustment. Many chairs have backrests that "flop" around. The backrests based on automotive designs lock into position so the backrest and seat cushion become fixed. This provides solid back support.
* Air lumbar adjustment. A triple chamber design is preferred. This design tends to be self-equalizing as it will spread the support and not feel like a ball pressing on your lower back.
* Height and angle adjustable headrest. A good design allows you to kick-back and relax your neck periodically.
* Adjustable armrests that can be lowered or flipped up out of the way. The best designs offer a solid feel when pressure is applied. Poorly designed armrests can feel "springy" or flop back and forth. Many persons use the armrests to help themselves out of the chair. Inferior designs can move unpredictably when pushing you out of the chair.
* Seat height and tilt adjustable.
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