Ergonomic Design: Dynamic bionic spine pressure relief ergonomic designed chair to improve efficiency and comfort in the working environment Mesh: High quality breathable wire mesh that allows air to pass through and avoid sweating while you are seated on chair Mechanism: Weight balance synchrotilt multilock mechanism to allow increased relaxation Full functional adjustable technology: Headrest, Lumbar support, 3D PU Armrest for angle adjustment Seat: High quality sliding seat for extra leg support Height Adjustment: Bifma certified gas lift for height adjustment Base: Heavy chrome Base with Nylon Castors for longer durability and stiffness of the base Assembly: Toolkit & detailed instructions manual included with the product. Contact our customer care for further assistance. Chargeable carpenter assembly service also available Warranty: Three years of warranty on all the components of the chair is applicable from the date of delivery. (Mesh/Fabric is not included in warranty)