The unique back height adjustment mechanism, 11 locking positions and easily adjustable seat, back and arms, combine to assure a dynamic seating posture to suit every user. Sona’s innovative technology offers a comprehensive solution for a modern working environment. Sona provides, maximum support, optimum efficiency, controlled flexibility and dynamic movement. Featuring the unique height adjustable J-bar, Sona is configured to be as individual as the people using it. It is a perfect example of classic style and innovative technology working together to create a satisfying and effective working environment.