Sleep. The Final Frontier. These are the voyages of the 100% polyester Star Trek Yellow Command Union Suit. Its mission…to boldly dream where no one has dreamed before! That works out, right? Invoking the mighty spirit of Captain James T. Kirk, the Star Trek Yellow Command Union Suit is a great way to stay warm during those long trips in space or those cold winter nights. There are also little treads on the ‘footers’ that are easily up to Starfleet’s standard. Easily!