The Serta Manager Office Chair is just what you need for extra comfort and motivation at work This heavy-duty chair supports up to 300 lbs The chair is upholstered in a soft, black breathable mesh fabric with contrasting white underlayer accents in lumbar and seat areas Double layer body pillows on back rest cradle your posture Arm height adjustability allows precise arm positioning and added hand, wrist and forearm comfort The waterfall seat edge is designed to lessen pressure on the back of the legs and increase circulation to reduce fatigue and increase working focus Adjust the seat height so your knees are at a 90 degree angle for proper circulation, and a pneumatic gas lift with tilt-tension adjustment and lockout lever to adjust it perfectly to your body It sits on smooth rolling multi-surface dual wheel casters with a chrome base to provide easy access to your surrounding work area Dimensions: 24.75"W x 27.25"D x 38-40.5"H