From ODS:

Contoured thick molded foam seat provides firm, yet gentle support to ensure all day comfort. Caressa task chair has a standard seat slider that allows for simple and intuitive calibration and ensures that users of all height and body types are comfortably accommodated. The deluxe lock synchro-tilt mechanism allows for floating motion or locking in 3 desired positions, ensuring optimal comfort and safety. To add height and forward-backward adjustable arms, breathable mesh back with adjustable lumbar support and you have a chair that allows anyone, anywhere to get comfortable and get to work.

Durable, breathable mesh back
Adjustable lumbar support for task and stool chair
Thick contoured molded foam seat
Backrest tension control
Height and forward-backward adjustable arms
Task chair features deluxe synchro-tilt mechanism with 3-position lock
with standard seat slider for optimal user comfort
Conference chair features simple 1-position lock synchro-tilt mechanism,
faux leather seat, polished aluminum arms and base, chrome accent casters
Stool option features simple 1-position lock synchro-tilt mechanism,
higher cylinder and height adjustable foot ring
Options include: choice of mesh colors for the backrest and fabric or faux leather for the seat,
adjustable headrest