The Britax One4Life convertible car seat bundle includes two identical top-rated convertible car seats, each with a 10-year lifespan to accommodate children from 5 to 120 pounds. These all-in-one seats feature 4 configurations - rear-facing infant, rear-facing toddler, forward-facing harness, and high-back booster - to grow with your child. ClickTight installation technology, steel frame, SafeCell crumple zone, and V-shaped tether provide unparalleled safety. The adjustable headrest and no-rethread harness ensure a secure fit as your child grows. Nine recline positions, cooling channels and ventilated mesh improve comfort on every ride. With machine-washable covers, dishwasher-safe cup holders and premium padding, these complementary seats make travel with multiple children safe, comfortable and convenient for the next decade.