A seat assembly is disclosed, and includes a seat having opposing sides, a back support, and a seat pan. The seat assembly also includes at least two harness straps extending in a generally vertical direction between the back support and the seat pan. The harness straps both have a lower portion and ends, where the ends of the harness straps are secured to the seat pan. An insert may be located within each of the harness straps. The inserts may extend in a generally upward direction away from the seat pan. The inserts are each a spring biased element that exerts a biasing force on a respective harness strap to urge the lower portion of the respective harness strap towards one of the opposing sides of the seat.