The note of horsehair is an extraordinary olfactive experience, typically presented as an accord designed to evoke the unique scent of a living, breathing equine. It is primarily dry, fibrous, and possesses a subtle, clean animalic warmth, reminiscent of sun-baked hay and brushed fur. Its texture in the mind's nose is almost bristly yet soft, with an underlying warmth that suggests a powerful, earthy presence. It often carries nuances of suede and well-worn leather, mingled with a faint, clean musk, sometimes even a mineralic or metallic tang akin to horse sweat after a vigorous gallop, but without being overtly pungent or skanky. The initial impression can be surprising, even slightly challenging, but it quickly settles into a sophisticated, grounding aroma. Its projection is moderate, creating an intimate aura rather than a loud statement, and its longevity is impressive, performing beautifully as a long-lasting heart or even a distinct base note, lending a unique animalic texture to the drydown.