Onyx II is extremely comfortle due to its high density moulded foam, This high density foam gives a better seating experience lasting much longer with regular use but maintaining the shape of the chair seat for several years | The new design Onyx crafted with high level engineering displaying a smooth contour and line delivering a symetrical and clean look in any office | The new tubular tough steel frames adds comfort and safety to the experience at a bargain price | Product comes in flat-packed | High density moulded foam | High grade black quality mesh | Slick chair frame - no welding points | Solid tubular steel frame | Height Adjustable armrest with PU arm pad | Adjustable lumbar suppot | 3 Position locking mechanism | Mesh, Fabric & Nylon Base | 3 year warranty on all structural and mechanical components | 3 year warranty on fabric and foam wear | 110kg weight rating | BIFMA Approved