Mesh Ergonomic Office Chair - Black features a headrest & lumbar support to balance alignment between the head, spine, hips, and feet for stressless work.Metal Base along with plastic and nylon. Fabric seat and Mesh Back Height Adjustable Headrest & Lumbar Support Flipped Arms Plywood seat filled with Cutting Foam Locking tilt mechanism UE KD Structure Painted Steel Base 50R PA Black Castors 120kg weight limit Product is flat pack and requires two person assembly