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 50 pounds. 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. Try this seat for a top notch extended-use option at an affordable price. 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. REAR-FACING Fit: Top of head is at least 25 mm (1 inch) below the top of the child restraint seat back. FORWARD-FACING Fit: The tops of the child’s ears are at or below the top of child restraint seat back. Do not lubricate or immerse in water any part of this child restraint, unless rinsing is permitted. Plastic and metal parts may be wiped clean with mild soap and water and dried with a soft cloth. Do not use abrasive cleaners or solvents.