Giorgio Armani Si For Women Edp 150ml The base notes provide depth and longevity to the perfume: Vanilla: A warm and sweet note that adds a creamy and comforting dimension.Patchouli: A woody and earthy note that gives Si its chypre character.Ambroxan: A synthetic compound with an ambery, animalic, and musky scent, enhancing the overall warmth of the fragrance.