The Safety 1st SlimRide 4-in-1 Convertible Car Seat is built to grow with your child while keeping them safe and comfortable on the road. With 4 modes of use (rear-facing (5–40 lbs. and 19”–40”), forward-facing (30–65 lbs. and 34.4”–49”), belt-positioning booster and backless booster (40–100 lbs. and 43”–52”), the Safety 1st SlimRide is ready to take your baby home from the hospital or take your big kid to soccer practice. The seat’s slim design allows for fitting 3 across the back seat in most vehicles without sacrificing safety or comfort. With a 5-position adjustable base; a 1-hand, 10-position adjustable headrest; an easy-to-convert backless booster; and machine-washable and -dryable fabric, it’s the only car seat your child will need, from birth through age 10.