A seat assembly for a vehicle includes a seat, and a first seatbelt having a first end and a second end. The first end of the first seatbelt is coupled to the seat. The seat assembly includes a latch plate and a second seatbelt. The latch plate is fixed to the second end of the first seatbelt, and the second seatbelt is slideably coupled to the latch plate. The first seatbelt and the second seatbelt increase lateral support of the occupant during, e.g., a rollover event, oblique or side impacts.