Embodiments of a car seat include an outer protective shell, an inner seat, a suspension system connecting and permitting relative movement between the inner seat and the outer protective shell. The suspension system may include a plurality of deformable metal straps. Also, embodiments of a car seat system include a frame constructed to couple to a vehicle seat. The frame has a vertical portion that extends upwardly substantially along a vehicle seatback. The vertical portion extends at least half of the height of vehicle seatback. Also, the system includes a car seat constructed to couple to the frame.