The Maxi Cosi Kani 4-in-1 Convertible Car Seat is designed to grow with your child from birth to 10 years (5-100 lbs) and is the only convertible car seat that easily transforms into a backless booster. Its slim design fits three across in most vehicles without compromising safety or comfort. With a 10-position adjustable headrest and 5-position base, it ensures a secure fit as your child grows. The ClipQuick™ auto-magnetic chest clip makes buckling quick and easy. Plus, it features premium vegan leather accents and EcoCare fabrics made from recycled plastic bottles, which are soft, breathable, and machine washable.