Which Spanish football club's nickname is "Los Colchoneros" which translates as "The Mattress Makers"?

Club Atlético de Madrid, commonly referred to as Atlético Madrid in English or simply as Atlético or Atleti, is a Spanish professional football club based in Madrid, that plays in La Liga. In terms of league titles won, Atlético Madrid is the third most successful club in Spanish football – behind Real Madrid and Barcelona.

Atlético's home kit is red and white vertical striped shirts, blue shorts, and blue and red socks. This combination has been used since 1911. Throughout their history, the club has been known by a number of nicknames, including 'Los Colchoneros' ("The Mattress Makers"), due to their first team stripes being the same colours as traditional mattresses.