Calvin Klein's first unisex scent, CK One, was released in 1991.<br /> Its launch fragrance was revolutionary, offering the perfect blend of feminine and masculine notes. It is loved by men and women, making it a very well-known scent. https://www.topscosmetics.uk/shop/perfume/mens-aftershave/calvin-klein-ck-one-eau-de-toilette-spray-100ml/