Did you know that Underoos are still a thing? Not only that, but they are available in adult sizes. And if you are a Harry Potter fan, you can get Underoos with the coats of arms for each of the dormitories at Hogwarts. You can wear them and fantasize about being a Gryffindor, Ravenclaw, Hufflepuff, or Slytherin. Sorry guys, these are only available in women's sizes. Only $24.99 a set. Because there's no rule that says you have to outgrow Pottermania.