High Back office & study chair has breathable mesh back and thick molded cushion seat with high-quality upholstery fabric material gives excellent support while also preventing heat and moisture build-up, keeping your entire body cool and comfortable. Top material made of premium-quality, toxin-free and harmful chemical-free fabric and metal. Fiber-based armrests that fully support appropriate posture and relax your arms. A heavy-duty foundation ensures durability and stability.The rocking mode provides for more relaxation. To recline up to 135 degrees, draw the lever outwards. It can also be locked at 90 degrees by pushing it inwards. It's simpler to rock back in your chair with a tilt-tension knob beneath the seat.