Costus gives a fragrance a distinctive rooty character: earthy, woody and softly animalic, with a dry texture that can recall warm skin, dust and aromatic roots. It is usually used as a supporting base note rather than a bright opening, adding depth and a slightly untamed edge to men's compositions.
Around woods, leather, amber and musk, Costus can make the dry-down feel darker and more textured. In floral or spicy blends, it provides contrast, tempering sweetness with a dry, earthy accent. Its effect depends strongly on the surrounding materials: restrained amounts add shadow and structure, while a more prominent presence creates a rugged, vintage-leaning impression. Choose this style if you enjoy earthy woods and nuanced, less conventionally clean dry-downs.