Ck One Cologne by Calvin Klein, Ck One has remained at the top of most must-have perfume lists since its introduction in 1994. Created by legendary noses Alberto Morillas and Harry Fremont, this fragrance deserves its popular reputation. Calvin Klein founded his name-bearing fashion house in the United States at the end of the 1960s. His style is known for its classic minimalism, designer jeans, and casual collections. The house launched its first perfume in 1981 and many more soon followed, including Obsession, one of the most successful perfumes of all time. Today this house endures as an icon of American fashion.