Mask Off was released by American rapper Future in 2017 as a single from his self titled album, produced by Metro Boomin around a flute sample from Tommy Butler's Prison Song. The track became one of Future's biggest hits and spread widely online through the Mask Off Challenge, where musicians covered the flute line on different instruments. That viral instrumental hook outlived the chart run, becoming shorthand in edits and memes for confidence, reveals and mask related jokes, which is why the short loop remains instantly recognisable today.