RideSafer's innovative design elements reduce head and knee excursion, reposition lap belt below abdomen to protect organs, and relocate shoulder belt away from the child’s neck | RideSafer Travel Vest has two different ways to use; the first way is to use with a vehicle lap belt and top tether by securing RideSafer with a top tether anchor in the vehicle. The other way is to use without a tether belt. RideSafer can also be used with a lap and shoulder belt only | RideSafer is certified for use in motor vehicles, meets all applicable FMVSS 213 requirements, and tested with lap-only belt plus tether and lap/shoulder belt to meet certification and performance standards according to FMVSS 213 | RideSafer's age range is 3 years and above and the weight range is between 30 lbs. and 110 lbs | RideSafer can be used with Delighter Booster made by the same manufacturer, Safe Traffic System, Inc