RideSafer Vest Travel Car Seat. Great lightweight car seat option for when you don’t want to lug a full size car seat on a vacation. This is a size small - best for kids roughly 3-6 years old. This will fit a kid within the following measurements: 1. waist measurement of 20”-26” when seated 2. a torso height (top of thigh to shoulder, when seated) of 10”-14” 3. Average height 35”-48” This vest is does not expire until August 2030. It has been used fewer than 8 times and is in good condition with all of its accessories. Included accessories are tether strap, neck pillow, crotch strap, and carry bag.