Ridesafer's innovative design elements optimize vehicle seat belt for correct fit and protection for a child, reduce head and knee excursion, reposition lap belt below abdomen to protect organs, and relocate shoulder belt away from child's neck. Ride Safer is certified for use in motor vehicles, Meets all applicable FMVSS 213 requirements, and tested with lap-only seatbelts plus tether and lap/shoulder belt to meet certification and performance standards according to FMVSS 213. Ridesafer's age range is (3 to 6 Y.O) and above and weight range is between 30 lbs. to 60 lbs. and height range 35 – 50 inches Ride Safer can be used with Delighter Booster made by same manufacturer, Safe Traffic System, Inc.