Read the article. You are making an incorrect assumption that anybody has purchased these shirts, or that they even exist.
Cool, thanks.. faith in humanity restored.
I am in the bad habit of reading HN on my old phone (CM7). The comments load much quicker than the articles, and sometimes they lead me astray.
I understand. I am guilty of only reading the comments when I feel an article is meant to address a single very interesting question, and then fails to go anywhere near it in the first two paragraphs.