The product is a vintage 1961 Barbie Ken Campus Hero #770 knit sweater, part of the Barbie Ken Sports product line by Mattel. This single unit sweater is made of cloth material and features a multicolor design, perfect for a 12-inch boy doll like Ken. The doll clothing style is vintage, and the set includes a sweater that is ideal for a sporting activity occasion. This original Barbie franchise piece from Japan is a highly collectible item for doll enthusiasts interested in the 1960s era of fashion dolls.