Masons work has been considered controversial and provocative, however he never try’s to be controversial in his subject matter just for the sake of it, there is always an underlying reason for the work he produces.
 
Mason is probably best known for his mask. It has become a trademark, hiding his identity whilst creating a mystique which helps with promotion and publicity. He began wearing it when in 2010 he said he was going to reveal the face of the artist Banksy in an oil painting.