CK One by Calvin Klein is a fresh and aromatic citrus scent for both men and women. It contains notes of pineapple, green notes, mandarin orange, papaya, bergamot, lemon, jasmine, lily-of-the-valley, rose,amber, musk and oakmoss on a woody base. The fragrance is inspired by classic citrus colognes but with a floral twist. CK One was one of the first unisex fragrances to be released. It remains just as popular today and also has an annual limited edition summer version.