Abstract: A passenger seat is provided that utilizes existing standard pitch dimensions for multiple seating classes, in combination with a proprietary reconfiguration mechanism that allows passengers to maintain an acceptable knee clearance regardless of the seat's orientation. According to some embodiments, a passenger seat may reverse position of the backrest in a way that maintains passenger density (number of passengers per class), while providing appropriate levels of comfort and respect for current social norms related to personal space. In some embodiments, a reversible tray table is provided for use with the reversible seat. In some embodiments, the tray table may couple with an adjacent tray table with engagement features.