The Maxi Cosi Kani is made to fit your child for a decade, one car seat with 4 modes of use from birth to 10 years old (5-100 lbs) Kani’s slim design allows a 3 across the back seat fit in most vehicles without sacrificing safety or comfort. The 10-position adjustable headrest and 5-position adjustable base allows for easy transitions to ensure a secure fit for your growing child ClipQuick auto-magnetic chest clip gets your child buckled in securely and on your way quickly