Fragrance
Sillage
Definition
French for 'wake' or 'trail.' The radius of scent projection a fragrance leaves as you move through a space. High-sillage fragrances are detected from several metres; low-sillage fragrances stay close to skin.
Why it matters for dupe shopping
Luxury niche fragrances often have engineered sillage. Cheap dupes frequently underperform here because they reduce the concentration of expensive aromatic compounds.