Folding assemblies for vehicles are described. In one aspect, a folding headrest assembly for a vehicle seat comprises a headrest having a frame. A pivot joint is coupled to the frame for rotatably supporting the headrest with respect to the vehicle seat between an upright position and a folded position. A support rod extends from the pivot joint and is configured for coupling to the vehicle seat. The headrest receives the pivot joint and a portion of the support rod, and the headrest defines an opening configured to provide clearance for the support rod as the headrest is rotated about the pivot joint relative to the support rod. A closeout member coupled to the support rod circumscribes at least an exposed portion of the pivot joint that is aligned with the opening of the headrest.