RVCA x Ali Float Sting Button Up Shirt. The RVCA x Ali Float Sting Button Up Shirt blends bold style with iconic inspiration. Featuring an allover print repeating Muhammad Ali’s legendary phrase, “Float Like a Butterfly, Sting Like a Bee,” this short sleeve shirt makes a statement from every angle. Designed with a relaxed camp collar, button-front closure, and dual chest pockets, it offers both function and flair. A woven RVCA label accents the left pocket, while a special RVCA x Muhammad Ali hem label completes the look.55% Cotton 45% Viscose. Machine wash. Imported.