Classic Thundercats Merchandise design. Thundercats Thundercats Classic is 100% authentic, officially licensed Thundercats merchandise! Thundercats features a heroic group of catlike humanoid aliens that fled their dying world. Lion-O, Cheetara, Panthro, Tygra, Snarf and others, seek refuge on Earth from their enemies, the Mutants of Plun-Darr, and the evil sorcerer Mumm-Ra. Lightweight, Classic fit, Double-needle sleeve and bottom hem