The note unfolds as a pristine breath of fresh air, remarkably clean and crystalline, often described as 'aquatic' or 'ozonic.' Its initial impression is one of cool transparency, almost like the scent of air just before a summer rain or the exhilarating aroma carried on a sea breeze. It possesses a subtle, almost metallic sharpness, reminiscent of freshly laundered linen drying in the sun, yet it remains airy and devoid of harshness. It lacks any inherent sweetness or warmth, projecting an ethereal, expansive quality. It typically behaves as a top to heart note, offering immediate lift and luminosity to a composition, brightening heavier elements without dominating. Its intensity is moderate but piercing, with a fresh, somewhat cool texture. Longevity is fair for an uplifting component, often lingering gently through the heart of a fragrance.