Our Family VizVest Set contains 4 Vests, 2 Adult Standard Safety Vest, Unisize (fits up to 50") and 2 Kid Safety Vest. (Unisize: One size fits all means, the Velcro Lock is adjustable for perfect fitting.) Family Safety Vest set comes with two storage bags that fold flat. It is recommended that these bags be stored within the car within storage compartments, or under the front seats. For optimal safety, the vests should be put on prior to leaving the car while on the roadside.