The Britax car seat bundle includes the One4Life all-in-one convertible car seat and the Poplar S slim convertible car seat to cover your child's needs from infancy through the booster seat years. The One4Life car seat accommodates children rear-facing from 5-50 lbs and forward-facing from 20-120 lbs with a 10-year lifespan. It features ClickTight installation, a steel frame, SafeCell technology, and a V-shaped tether for trusted safety. The 9 recline positions, cooling channels, and premium padding ensure comfort. The slim 17-inch Poplar S fits rear-facing infants up to 50 lbs and transitions to forward-facing up to 65 lbs. It also utilizes Britax's patented safety technologies. The refined inserts and flip-forward buckle pad optimize fit and boarding. With both award-winning Britax convertibles, you can transport children safely and comfortably during every stage while taking up minimal space in your backseat. The One4Life handles bigger kids while the Poplar S maximizes room for multiple seats. Both seats have machine-washable covers and dishwasher-safe cup holders for easy cleaning between rides.