CK One is a citrus aromatic chypre unisex fragrance developed by Alberto Morillas[1] and Harry Fremont for Calvin Klein.
[2] CK One's top notes include pineapple, mandarin orange, papaya, bergamot, cardamom and lemon.
Its middle notes include nutmeg, violet, orris root, jasmine, lily-of-the-valley and rose.
[5] CK One Essence, a "parfum intense" version of the original scent was released in August 2024.
[6] It is marketed as celebrating the 30th anniversary of CK One with a "signature scent for men and women, for all occasions".