The shaped-Shaped" design of the backrest permits a seated user’s shoulder blades to travel more fully rearward when leaning back. In addition Office Master’s Double Comfort Seating (DCS) Technology offers a seating experience that is at once soft and supportive, and truly beyond compare. Features: pneumatic lift, EZ back height adjustment, infinitely locking seat tilt, infinitely locking back tilt, forward tilting adjustment, rocking tension adjustment, fabric panel back, seat slider, memory foam in backrest, double comfort seat cushion.