Leyendecker is known for his creation of the archetype of the fashionable American male with his advertisements for Arrow Collar. These images sold to an eager public the idea of a glamorous lifestyle, the bedrock upon which modern advertising was built. He also was the creator instantly recognizable icons, such as the New Year's baby and Santa Claus, that are to this day an integral part of the lexicon of Americana and was commissioned to paint more Saturday Evening Post covers than any other artist.