The 1956 Rin Tin Tin Trading Post Premium Order Card Sweat Shirt is a collectible advertising item related to Nabisco's cereal brand. This item likely features imagery or branding related to the iconic Rin Tin Tin character and was likely part of a promotional campaign where consumers could order it as a premium item. The sweatshirt would have been a desirable collector's item for fans of Nabisco cereals or Rin Tin Tin memorabilia.