Sillage vs Projection vs Longevity
Sillage, projection, longevity, throw — what each fragrance performance term actually means, how they differ, and how to make a fragrance last longer.
By Fragrance Fragrance EditorialUpdated
When someone says a fragrance “has crazy sillage” or “projects six feet” or “dies in two hours,” they're each describing different things. Mixing them up makes review-reading and blind-buying harder than it needs to be. Here's how the three terms actually divide up:
| Term | What it measures | Unit |
|---|---|---|
| Sillage | Scent trail you leave behind as you move | Subjective: weak / moderate / strong |
| Projection | Scent radius around you at any moment | Distance: skin / arm's length / room-filling |
| Longevity | How long it stays detectable on skin | Hours from application |
Sillage
Sillage (pronounced “see-yazh”) comes from the French for “wake” — like the wake a boat leaves on water. It describes the trail of scent left behind in air after you walk through a space. Strong sillage means people in a hallway can tell you passed through five minutes ago. Low sillage means the scent stays so close to your skin that nobody notices unless they're standing within a foot of you.
Sillage isn't the same as “loud.” A fragrance can be intensely scented up close but have weak sillage if it doesn't carry. The classic high-sillage references in fragrance discussion include Mugler Angel, Tom Ford Tobacco Vanille, and most of the MFK Baccarat Rouge 540 variants. Quiet-sillage references include most niche skin scents and many of the Le Labo line.
Projection
Projection is the immediate scent bubble around you at any single moment. If sillage is the wake, projection is the size of the boat. Strong projection means someone two arms' lengths away can smell you clearly; weak projection means they need to lean in.
Projection usually peaks 15-45 minutes after application as the top notes evaporate and the heart blooms, then settles into a slower decay through the dry-down. A fragrance with great longevity but weak after-hour-one projection is what people mean by a “skin scent” — it lasts but stays personal.
Longevity
Longevity is total wear time on skin — from spraying to fading below the threshold of detection. The base concentration matters most:
- Eau de Cologne (2-5% oil): 2-3 hours typical wear
- Eau de Toilette (5-15% oil): 3-5 hours typical wear
- Eau de Parfum (15-20% oil): 6-8+ hours typical wear
- Parfum / Extrait (20-40% oil): 8-12+ hours typical wear
See the Eau de Parfum vs Eau de Toilette guide for the full concentration breakdown. Beyond concentration, the composition matters — citrus and aquatic notes are inherently shorter-lived than oud, amber, and resins.
How to make a fragrance last longer
- Moisturize first. Spray onto skin pre-treated with an unscented lotion. Oils help fragrance molecules cling instead of evaporating off dry skin.
- Aim for pulse points. Wrists, neck, behind ears, inner elbows — areas where blood flow keeps skin warm and steadily lifts the fragrance off the surface.
- Don't rub. Friction generates heat that breaks down delicate top notes faster. Spray and let it dry.
- Layer. Use a matching shower gel, body lotion, or beard oil under the fragrance. The unscented base extends the same scent through more of the day.
- Spray clothing carefully. Fragrance lasts longer on fabric than skin, but stains some materials (especially silk and dark vintage fabrics). Test a hidden spot first.
- Switch to a higher concentration. If your favorite EDT fades too fast, the EDP version usually solves it. The composition is similar but the higher oil load lasts hours longer.