The note unfolds as an expansive, luminous breath, akin to pure, rarefied air found at high altitudes under a starlit sky. It is clean, crisp, and immensely bright, often possessing an initial effervescence that sparkles on the skin like cosmic dust. There's a cool, almost crystalline texture to it, often veering into aldehydic brilliance or ethereal ozonic clarity. Its projection is typically wide and diffusive, creating an aura rather than a dense presence. While not overtly floral or fruity, it can carry an abstract, transparent sweetness, a whisper of celestial nectar. Longevity varies, but a well-constructed version provides a persistent, uplifting hum, often settling into a clean, musky, or subtly metallic hum, serving as a top or heart note that lifts the entire composition.