In two-position lift chairs, when the chair is reclining and the footrest is going up, the angle between the backrest and the seat does not change.
On the other hand, in a three-position lift chair, when the chair is reclining and the footrest is going up, the backrest reclines back farther, opening the angle between the backrest and the seat. The chair can recline more fully into a “sleeper” or “napper” position.
UltraComfort also makes Infinite Position lift chairs which easily go into Zero Gravity, Trendelenburg and more.