"Our breathable Mesh provides optimal airflow to avoid sweating and sticking, while its softness conforms to your body, without feeling ""wirey"". Ergonomic Backrest, The open mesh design creates a breathable, well-ventilated backrest. The office chairs backrest with lumbar support will help you keep in the right position during prolonged working. Breathable Padded Seat, The padded mesh seat is thick and resilient. Made of high quality thick sponge and breathable mesh cloth, preventing body heat and keeping your hip and legs sweat-free. Multi-function Mechanism. Pneumatic controls make it easier to raise or lower the seat. The rocking mode can relax you from heavy work, pull out the handle to start rocking and pull it in to stop. Color: Blue."