Contemporary chair upholstered in Black mesh material, which allows air to pass through, adding to long term comfort by preventing body heat and moisture build-up. Breathable mesh fabric seat. Ratchet back height adjustment. Lumbar adjustment. Adjustable height armrests. Spring-tilt mechanism. Pneumatic gas lift seat height adjustment. Adjustable tilt tension control. 25" nylon high base. Hooded double wheel casters.