Rear-facing infant seats plug into a base that stays in your car so you can take your sleeping baby out of the car without waking him. (Make sure your infant car seat is compatible with your stroller.) Your baby must ride in a rear-facing seat until he turns 1 and weighs at least 20 pounds—whichever comes last. But experts recommend keeping your baby rear-facing for longer, until he reaches the maximum height and weight limits allowed by the seat’s manufacturer. Never place a rear-facing seat in a front seat with an airbag or turn it to face forward.
Convertible car seats stay installed in your car. Your baby can ride in the rear-facing position from birth until he turns 1 and weighs at least 20 pounds. The seat can then be turned around to the forward-facing position.