Lowest price ever on the Britax One4Life Convertible Infant Car Seat! Get it now in Glacier Graphite or Iris Onyx for only $279.99. 10 YEARS OF USE: The Britax One4Life convertible car seat delivers comfort and security from 5 to 120 pounds and up to 63 inches tall ONE CAR SEAT FOR LIFE: This car seat features 4 configurations, including rear facing infant car seat,