ApartmentTherapy.com: It's a Diffrient World
Unplggd calls Diffrient World "an evolutionary transition from control-rich task seating to a simplified and auto-adapting mesh-lumbar support system."
If your chair has a back lock, unlock it and adjust the recline tension according to your body weight. Your chair should comfortably support you throughout the entire recline range.
Ergo Gear Guide