HOW TO CHOOSE A CAR SEAT
What is an all-in-one car seat?
The All-in-One car seat or 4-in-1 is designed for extended use. Go from rear-facing to forward-facing to booster mode with ease. Adjustable features accommodate each of the four stages of car seat use children grow through—infant, toddler, preschooler and big kid. One car seat that does it all.
All-In-One Car Seat Checklist
Purchase a single car seat that safely secures your child from infant through big kid Keep your little one in the safer, rear-facing position for longer – up to 40 lbs. Easily transition from rear-facing, to forward-facing and booster mode 
An all-in-one is not portable or stroller friendly like a traditional infant car seat Some wear is to be expected over the life of the seat, though seat fabrics are machine washable You miss out on the milestone of graduating to a new car seat