DC Comics and Hanna-Barbera licensed specific merchandising as tie-ins to the hit 1970s Saturday morning cartoon Super Friends. One of those items was Super Friends Sneakers in 1974. This is an insert card that came with the box of sneakers featuring the artwork of Alex Toth, who designed the look of the animated series, showing the team at the time: Superman, Batman, Wonder Woman, Robin, Aquaman, Marvin, Wendy, and Wonder Dog. On the back of the card is an image of Superman showing his strength by breaking a chain against a circle field.
This is considered quite a rare item to find since most were thrown away, along with the box, after the sneakers were purchased.