Star Trek Discovery design. Gear up for your next work out with the Star Trek: Discovery Disco Tee, as seen on the series. Features the Discovery delta on both sleeves and the word DISCO for the U.S.S. Discovery on the front. Official Star Trek Merchandise: This Star Trek Discovery Disco tee is an officially licensed piece of apparel, ensuring authenticity and adherence to the iconic series' design. Lightweight, Classic fit, Double-needle sleeve and bottom hem