The 100% cotton Dr. Who Tardis Pajama Set actually works as a time machine, but I must warn you...it can only travel into the future and it is in usual spurts of one to twelve hours. It also works a lot better if you use it bed for some reason though I can't seem to figure out why. Showing off the good Doctor's favorite space-chariot, the Dr. Who Tardis Pajama Set is both a costume-style tank top and shorts set wholly dedicated to all sorts of temporal adventures. Hooray!