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 features four configurations to accommodate children rear-facing from 5-50 pounds and forward-facing to 120 pounds with a 5-point harness to 63 inches. Its click-tight installation system, steel frame, SafeCell technology, and V-shaped tether provide safety, while the adjustable harness, multiple recline positions, cooling channels and removable pillow and insert ensure comfort. Complementing the One4Life, the 17-inch Poplar S slim design allows for a 3-across fit to save space. It rear-faces to 50 pounds and forward-faces to 65 pounds with a 14-position harness for a tailored fit. The Poplar S includes the click-tight system for easy install along with Britax safety features like a steel frame, SafeCell technology, and V-shaped tether. Its comfort features include premium padding, a stability bar for rear-facing use, and a flip-forward buckle pad. With both easy installation and adjustments for growing children, this bundle offers trusted Britax safety and comfort features to meet your family's needs over 10 years of use.