A seat system of a vehicle includes a cushion portion configured to support an occupant sitting on the cushion portion, and a back portion configured to support the back of the occupant sitting on the cushion portion. A lower portion includes: a first side; a second side that is opposite the first side; and an infant car seat base located on the first side. An actuator is configured to selectively actuate the lower portion to: a first position where the infant car seat base is located entirely under the cushion portion; and a second position where at least a portion of the second side of the lower portion contacts the cushion portion and the infant car seat base is located entirely above the cushion portion.