ALFORDSON Office Chair Mesh Ergonomic Seat Grey White Features:Materials: powder-coated stainless steel frame & base, polyester mesh upholstery, high-resilience foam padding, polypropylene castors - Includes: 1 x office chair, 1 x assembly manual - High-back design with adjustable lumbar support promotes proper posture - Angle & height adjustable headrest for personalised neck support - Headrest can be removed for those preferring a mid-back chair option - Height adjustable armrests for arm support customisation - Adjustable knob for optimal reclining comfort - Generous foam padded seat for enhanced comfort during long hours - Please note: it is recommended that this chair be placed on hard floors or a floor mat. If on a carpet or rug, please take care not to drag the chair while sitting on it as additional weight coupled with the friction of the carpet/rug could cause the castors to get stuck and malfunction or break.