The adjustable lumbar support system is one of the most important features of an ERA Office Chair. It's what makes ERA Office Chairs true ergonomic office chairs. The adjustable lumbar support system is designed to relieve tension in the lower back area, which is where many people feel regular pain and discomfort. Because the lumbar support is adjustable, it is made to fit your personal needs, by adjusting in and out to help you find the right level of lumbar support. This adjustable lumbar support system is designed to help users be more productive and comfortable throughout the day.