A passenger seat row, for a vehicle such as a passenger aircraft, convertible between passenger seats and bunk beds. The passenger seat row includes a frame assembly including a backrest extending substantially a length of the frame assembly, the backrest configured to move between a stowed condition against the frame assembly and a deployed condition forming a substantially horizontal bed. Armrests attached to the frame assembly reposition to support the bed when in the deployed condition. In use, deploying the backrest forms a first bed positioned over the second bed to form a bunk bed sleeping provision for use, for example, during flight.