Here's why:
* Coca-Cola Campaign: Sundblom, starting in 1931, created a series of iconic illustrations for Coca-Cola featuring Santa Claus. These images, used in advertising and marketing campaigns, solidified the image of a jolly, red-suited Santa.
* Influence and Legacy: Sundblom's work became so popular and influential that it's widely considered the definitive representation of Santa Claus today. It's nearly impossible to imagine Santa in any other attire.
It's important to note that Santa Claus, as we know him, is a modern invention and evolved over time. Earlier depictions showed him in different colors, even green. Sundblom's work, however, popularized the red suit and helped create the modern image of Santa Claus.