This ergonomic mid-back swivel office chair is designed to keep you comfortable and supported all day. A breathable, ventilated mesh back allows air to circulate to keep you cool during long work days, while the built-in lumbar support helps prevent back strain and muscle fatigue. The T-shaped arms help relieve pressure from your neck and shoulders, and the seat is generously padded with CAL 117 fire retardant foam and covered with mesh upholstery. Additionally, the highly customizable office chair features a pneumatic height adjustable 360-degree swivel seat to create a comfortable, custom seating experience for all body types, and the heavy-duty nylon base with dual wheel casters makes it easy to roll across the floor.