Suggested Age: Newborn, up to 10 yearsStage(s): Rear-facing from 4-40 pounds and up to 43 inches, Forward-facing from 25-65 pounds and 38-54 inches, Highback Booster from 40-100 pounds and 38-57 inchesGrows with Child: Ergonomic child comfort from day 1 to year 10, 4-stage FitKit System includes removable infant positioner, toddler pad, FitKit core and deluxe booster shoulder pad, 9-position recline, 10-position headrestIncludes: 2 Dishwasher safe Cup-folders for slim fit, Machine Washable layered fabrics, SuperCinch LATCH tightener, Steel-reinforced frame, LockSure Seat Belt Locking System, Recline Booster ModesSafety Features: 5-point quick-adjust harness, DuoGuard head and torso side-impact protection, SuperCinch LATCH tightener, Steel-reinforced frame, EPS-energy absorbing foam. Booster mode belt-guidesEasiest All-In-One to grow with: 4-Stages (Infant, Toddler, Pre-school, Big Kid) - as baby grows, simply remove the stage seat pad layer to reveal a new seat to grow into.Installation: Easy access QR code and Fit4Stages.com transition guide, 9-position ReclineSure leveling system, SuperCinch LATCH tightener and LockSure steel-reinforced seat belt locking system