Keep your growing child safe and comfortable in Evenflo's Sonus convertible car seat. With a rear-facing weight rating up to 40 pounds and a forward-facing weight rating up to 65 pounds. The Sonus 65 features a reinforced frame that allows an extended weight limit of up to 65 pounds so your child can remain harnessed longer! For added comfort, this seat offers a built-in ventilation system that provides a comfortable seat for your child through all seasons. At Evenflo, we continue to go above and beyond government standards. Designed and tested for structural integrity at energy levels approximately 2x the federal crash test standard AND tested to simulate a side impact event and rollover event.