A passenger seat having improved backrest comfort features. The passenger seat has a backrest with a movable portion. In one example, the movable portion is defined by an upper backrest portion that can slide up and away from a lower backrest portion to provide a gap between the two portions. The gap 5 may provide an arm or elbow rest for a seat occupant. The movability of the backrest can also provide enhanced comfort for the seat occupant by allowing adjustability of the head rest portion. In other examples, the movable portion comprises the entire backrest of the seat. When in a raised position, the backrest may also provide enhanced privacy to the seat occupant.