Star Wars BB-8 Astromech Droid Round Girls Tanks Looking for droids? Look no further than the Star Wars BB-8 Astromech Droid Round Heather Royal Blue Racerback Tank Top. A round distressed print on the front of this awesome blue BB-8 shirt reads "Astromech Droid" next to the newest droid on the block: BB-8. 50% Polyester, 25% Cotton, 25% Rayon.