By the way, these are THOR pajama pants.What gave it away? Could it be the full-color image of 'The Mighty Thor' striking Mjolnir's leather-wrapped hilt to invoke devastating lightning clusters?How about the vertically aligned THOR logo pulled from the covers of classic THOR comics? Right, the one with torn ridges and perhaps a few bite marks from violently feeding Frost Giants.Could it have to do with the artist who rendered all of the above? The illustrious, infinitely inspiring 'King of Comics,' Jack Kirby?Yes, our Thor Logo Jack Kirby Men's Pajama Pants are obviously Thor pants for those very reasons -- they're practically crackling with glorious comic book goodness.Could they be any more "Thor-iffic?" Oh, yes:Soft? Of course.An elastic waistband with drawstring tie.A button-fly. All sizes are US sizes.