This ThunderCats t-shirt features a vintage image of the heroic characters Lion-O, Snarf, Panthro, Cheetara, and Tygra. The shirt reads Old School. The classic animated series ThunderCats followed the heroic Thunderians who fled their dying planet, and were chased by the Mumm-Ra and the Mutants of Plun-Darr to Third Earth. There, the ThunderCats and Mutants battled for control of the Sword of Omens.