Mesh backrest with integrated padding for maximum comfort Gently adapts to the contours of the back With vertically adjustable lumbar support made of memory foam Tri-Tensioning™ fastening saves readjustment and securely attaches the backrest to the chair Mesh fabric ensures air circulation and high comfort Easy to attach to any chair Meets the ergonomic requirements for office work with display screens confirmed by FIRA Int. Ltd, an independent ergonomics accreditation body (ISO 9241-5:1998)