Goalkeepers must wear kit that distinguishes them clearly from other players and match officials, as this is all that the FIFA Laws of the Game require. Some goalkeepers have received recognition for their match attire, like Lev Yashin of the Soviet Union, who was nicknamed the "Black Spider" for his distinctive all-black outfit; Klaus Lindenberger of Austria, who designed his own variation of a clown's costume; Jorge Campos of Mexico, who was popular for his colourful attire; Raul Plassmann of Cruzeiro Esporte Clube and his all-yellow outfit; and Gábor Király for wearing a pair of grey tracksuit bottoms instead of shorts.