The Evenflo SymphonyAll-In-One Car Seat accommodates children ranging from 5-110 lbs. with the most innovation and value on the market. Symphony provides exclusive safety features like Quick Connector technology; you simply Click, Click, Pull for a super-fast and super-snug installation! And with Infinite Slide Harness easily slides for an accurate fit every time. No reworking the harness as child grows! So parents can be sure children are properly secured every time.