The initial impression is a vivid, almost electric burst of intensely zesty, sharply tart, and wonderfully bitter freshness. It's not the sweet, pulpy fruit, but rather the vibrant, slightly abrasive oil expressed from the outer rind. There's an underlying clean, slightly pithy dryness, a crystalline quality that prevents it from becoming overly juicy or saccharine. It possesses a remarkable effervescence, akin to a carbonated citrus drink, projecting with enthusiastic radiance. Its texture is crisp and airy, yet with a subtle depth that hints at the botanical structure of the fruit itself. As a quintessential top note, its initial intense projection mellows within minutes, leaving a lingering, sophisticated, dry citrus echo that can persist for a surprisingly long time on the skin, often lending a 'clean linen' or 'just-washed' accord to the heart notes it introduces.