First Impressions
The first spray of Nº4 Neon feels like diving into electric light. There's an immediate jolt of brightness—not the soft glow of morning sun, but the high-definition brilliance of midday at the beach, where everything shimmers with almost surreal clarity. Pomelo and yuzu crash together in a sparkling wave, joined by mandarin orange that adds just enough sweetness to keep things approachable. This isn't a meditation on citrus; it's a celebration, verging on exuberant. The aldehydes lurking beneath give everything a fizzy, champagne-like quality, as if the fruit itself has been carbonated. Thomas Kosmala has crafted something decidedly modern here—a fragrance that feels simultaneously refreshing and slightly synthetic in the most intentional way, like neon lights reflecting off chrome.
The Scent Profile
The opening trilogy of pomelo, yuzu, and mandarin orange dominates the first fifteen minutes with unapologetic intensity. These aren't the polite citruses of classic colognes; they're amplified, almost hyper-real. The pomelo brings a bitter-bright edge, while yuzu contributes its distinctive Japanese citrus character—sharper and more complex than lemon. Mandarin rounds out the trio with a gentler, sweeter presence that prevents the composition from becoming too astringent.
As Nº4 Neon transitions into its heart, something unexpected happens. Mango and melon emerge, transforming the sharp citrus into something more overtly tropical and sweet. The mango is juicy and golden, while the melon adds a watery, almost cucumber-like coolness. It's here that galbanum makes its appearance—an unusual choice in a composition this sunny, but one that works brilliantly. This green, slightly resinous note provides structure and prevents the fruit from becoming cloying, acting as a kind of aromatic skeleton that holds everything together.
The base is where Nº4 Neon reveals its true character. Ozonic notes wash over the fruity heart like a cool breeze off the ocean, creating that distinctive airy, "fresh laundry" quality that reads as utterly contemporary. Solar notes amplify the warmth without adding traditional warmth—there's no amber, no woods, just the abstract impression of heat and light. The aldehydes, present from the opening, continue their work here, giving the entire composition a lifted, effervescent quality that keeps it from settling too heavily on the skin.
Character & Occasion
The community consensus is crystal clear: Nº4 Neon is overwhelmingly a summer fragrance, scoring 100% in that season, with spring following at a respectable 87%. By fall, its appeal drops to 38%, and winter sees it barely register at 15%. This is textbook warm-weather wear—the kind of fragrance that makes perfect sense when temperatures climb and you want something that feels as refreshing as it smells.
Day versus night tells an equally definitive story: 96% day, 33% night. This isn't a fragrance for intimate dinners or evening events. It's for morning coffee meetings, beach days, outdoor brunches, and afternoon adventures. The brightness and transparency that make it perfect for daytime wear would likely feel out of place in dimly lit settings.
The feminine designation shouldn't be taken too literally. While marketed toward women, the citrus-ozonic-aldehydic profile reads relatively unisex, especially given contemporary fragrance preferences that increasingly ignore traditional gender boundaries. Anyone drawn to bright, fresh, energetic scents will find something to love here.
Community Verdict
With 435 votes averaging 3.96 out of 5, Nº4 Neon sits comfortably in "very good" territory without quite reaching "masterpiece" status. This rating suggests a fragrance that delivers on its promises—refreshing, wearable, well-executed—but perhaps doesn't break revolutionary new ground or inspire passionate devotion. The relatively solid vote count indicates genuine community engagement, not just a handful of early reviews, lending credibility to that near-4-star rating.
How It Compares
The comparison to Wulóng Chá by Nishane is particularly interesting—both share that luminous, tea-like freshness, though Nº4 Neon leans fruitier and more overtly tropical. Hacivat by Nishane also appears in the similarity cluster, suggesting that Thomas Kosmala is playing in the same contemporary, citrus-forward space that Nishane has made its signature. The reference to Louis Vuitton's Imagination and Ex Nihilo's Blue Talisman positions Nº4 Neon in aspirational territory, though presumably at a more accessible price point than those luxury benchmarks.
Within Thomas Kosmala's numbered series, Nº4 Neon occupies the bright, extroverted end of the spectrum—a deliberate crowd-pleaser designed for maximum freshness and wearability.
The Bottom Line
Nº4 Neon achieves exactly what it sets out to do: deliver a shot of liquid sunshine that works beautifully in warm weather. At 3.96 stars, it's a fragrance that satisfies without necessarily revolutionizing. The composition is well-balanced, the performance presumably appropriate for its category, and the overall effect is one of polished, modern freshness.
Who should reach for this? Anyone building a warm-weather rotation who wants something cheerful and uncomplicated. Those who find traditional colognes too fleeting but heavy summer fragrances too oppressive. People who respond to that contemporary ozonic-aldehydic aesthetic that feels crisp and slightly futuristic. If you loved the fresh wave of fragrances from the past decade but want more fruit-forward sweetness, Nº4 Neon deserves a test drive.
The 435-person community has spoken: this is a solid, enjoyable fragrance that earns its place in the citrus-ozonic canon without necessarily rewriting the rules. Sometimes, that's exactly enough.
AI-generated editorial review
