A rail pair (1), for a vehicle seat (10), includes at least a lower seat rail (S1) and an upper seat rail (S2), which engage around one another in such a way that a rail profile is formed and which can be moved in relation to each other in a longitudinal direction (L) and can be interlocked by a rail locking device (2). Rolling elements (4) are arranged between the seat rails (S1, S2) in an interaction region. The upper seat rail (S2) includes two side walls (S2.1, S2.2), which two side walls (S2.1, S2.2), in a vertical orientation, protrude largely in parallel and perpendicularly from a bottom region (S2.3). One of the side walls (S2.2) is bent outward in a continued course in some regions of the longitudinal direction (L).