b'optional featuresThe following are optional extras to the range.Polished Base Inflatable Inflatable X-4D Arm Padadd 60 Seat Pad Thorax Support add 25add 42 add 37NOT AVAILABLEWITH HEAD REST OPTIONXL Seat Pad Memory Foam 580W x 520DSeat PR354 PR334 PR330 add 75 add 55CONTOURED BACK WITHCONTOURED BACK WITHCONTOURED BACK MULTIFUNCTIONAL ARMS AND MULTIFUNCTIONAL ARMS WITHOUT ARMSHEAD REST standard featuresErgonomic backrest, ratchet back height adjustment,seat tilt, multifunctional arms or fold away arms, inflatable lumbar and seat slide as standard. Full 5 year guarantee.43 www.airseating.co.uk'