Ergonomic Lumbar SupportThe backrest of our ergonomic office chair is ergonomically designed, and the lumbar pillow portion has a spring mechanism that adjusts to your seating position to provide elastic support.This mid-back computer desk chair brings premium comfort to any office. Flipping Armrests: receive under the table when you don't need to use it won't get in the way of your work Effective space-saving, perfect for small rooms, offices, bedrooms, living rooms or game rooms. Adjustable Rocking: receive under the table when you don't need to use it won't get in the way of your work Effective space-saving, perfect for small rooms, offices, bedrooms, living rooms or game rooms. Adjustable HeadrestThe headrest is designed so that you can easily adjust it to meet your needs. By adjusting the height and angle of the headrest, it provides more support for your head and neck, keeping you comfortable and avoiding neck and back aches and pains Rest Assured