DB wider seat and back version. All the wonderful features of the Discovery Back with the European inspired adjustment mechanism. Everything is adjustable from seated position even the rocking tension. A favorite of managers and those whole. The Discovery Back Series has been created for those who spend a great deal of time working from their chair. With a forward-thinking ergonomic design that prevents scapular impedance and the sigh producing comfort of DCS Technology, users will feel refreshed rather than fatigued at the end of the day. A healthy posture and Office Master?s dependability is a combination that will benefit everyone. Pneumatic lift, EZ back height adjustment, synchronous knee tilt, independent back tilt, positive back release, multiple position lock, seat slider, memory foam back, DCS (Double Comfort Seating) seat.