T-Shirt Design Star Wars Sample Print - AT-ATT Shirt designs printed on fabric, NOT actual t shirts. Silkscreened on thin felt like material, samples like this one were used to market the t shirt line to prospective retailers. This particular example was originally sent to Lucasfilm to document licensed products. The t shirts were sold in 1982 by Union Underwear, which also made Underoos, and are rarely found on the collector market. I have never seen production examples of some of these shirts.