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See all ads on AdLibrary →Corteiz (CRTZ) is a London streetwear brand founded around 2017 by the anonymous designer known as Clint419. The brand operates a password-gated website, releases drop codes exclusively via social media, and hosts guerrilla pop-up events that generate spontaneous queuing and press coverage — all without paid advertising. Corteiz became the most talked-about UK streetwear brand of the early 2020s entirely on organic momentum.