Costus, derived from the root of plants in the Saussurea genus, is a unique ingredient used in perfumery and traditional medicine. This botanical's scent is quite distinctive, often described as having a warm, earthy aroma with animalic qualities reminiscent of wet fur, wool, or raw hides, which can be both intriguing and challenging. Its complex profile is enriched further by hints of smoky and woody notes, adding depth and character to fragrances. Traditionally, costus was valued for its fixative properties, helping to stabilize more volatile scents in perfume formulations. Its intense and rich aroma makes it a favorite for creating oriental and exotic fragrance compositions, although it is used sparingly due to its potent nature and modern synthetic alternatives.