A seat assembly includes: a backrest having a cushion surface formed on a first side of the backrest and support surface formed on a second side of the backrest; a first track assembly located along a first side of the backrest and a second track assembly located along a second side of the backrest; and a plurality of guide pins extending from the backrest into the first track assembly and the second track assembly such that the backrest is movable along the first track assembly and the second track assembly on the plurality of guide pins between a stowed position and a deployed position.