Beginning around 4 months (min 12 lbs), when baby has good head and neck control, the Ergobaby Hip Seat with removable panel can be used in the front carry – parent facing and outward facing. Beginning around 6 months (min 17.2 lbs), when baby can sit on their own, baby can be carried in the back carry. They can also be carried with just the hip seat in parent facing, outward facing and hip.