The RideSafer Travel Vest, as recommended in the award-winning guidebook Travels with Baby: The Ultimate Guide for Planning Trips with Babies, Toddlers, and Preschool-Age Children, is an approved alternative to car seats and safety boosters for children 3 years and older. This bundle includes the RideSafer Travel Vest with head cushion and top tether for use with lap-only safety belt (not needed when using with 3-point safety harness or "shoulder belt"), plus the award-winning pocket guide Take-Along Travels with Baby: Hundreds of Tips to Help During Travel with Your Baby, Toddler, and Preschooler to help during all phases of travel with your young child. The RideSafer Travel Vest meets or exceeds FMVSS 213 for use in motor vehicles (please note it is not certified for use in aircraft). Use size SMALL with children approximately 3 to 6 years old who weigh 30 to 60 lbs. (13.6 to 27.2 kg) and are 34 to 52 inches tall (86.4 to 132 cm). For children ages 5 to 8 years and up to 80 lbs, please use LARGE.