Top, Heart, and Base Notes — And What 'Sillage' Really Means

A perfume is not one smell. It is a sequence — an opening, a middle, and a long, quiet tail — and a separate question of how far that scent travels around you. This is a guide to the vocabulary every fragrance description uses, and to what it actually feels like on skin.

If you have ever read a perfume description and seen "top notes of bergamot, heart of rose, base of sandalwood," and then wondered why no one ever explains what top and heart and base actually are, this article is for you. We will go through the structure (often called the fragrance pyramid), what happens at each stage, where the model comes from, what it does not capture, and how we think about all of this at SHŌ ITO. At the end we will also unpack two terms that are often confused: sillage and projection.

What are top, heart, and base notes?

A perfume does not smell the same in the first minute as it does an hour later, or six hours later. It unfolds. The fragrance pyramid is a way of describing that unfolding in three stages.

The reason is simple chemistry. A finished perfume is a mixture of many aromatic compounds, each with its own volatility — its tendency to evaporate from skin into the air. Lighter, smaller molecules evaporate quickly. Heavier, larger ones evaporate slowly. So the same bottle releases its ingredients in waves, lightest first, heaviest last. (Wikipedia: Note (perfumery)))

The three layers map onto that:

• Top notes are the most volatile. They are what you smell in the first few minutes after spraying — the bright, sharp, immediate impression. Citruses (bergamot, lemon, grapefruit), light herbs (mint, lavender), and aromatic spices (pink pepper, cardamom) are classic top-note materials. They typically last roughly 5 to 15 minutes before fading. (Wikipedia: Note (perfumery)))
• Heart notes (also called middle notes) emerge as the top notes fade. They are the main body of the perfume, the part most people would describe as "the scent" if you asked them an hour in. Florals (rose, jasmine, iris, ylang-ylang), softer spices (cinnamon, clove), and rounded fruits often live here. Heart notes generally hold for several hours.
• Base notes are the foundation. These are the heavy, slow-evaporating materials — woods (sandalwood, cedar), resins (benzoin, labdanum), musks, ambers, vanilla, oud — that settle deep into the skin. They give a perfume its long tail and its character at the end of the day. On a well-built fragrance, base notes can remain detectable for many hours, sometimes well past twenty-four. (Wikipedia: Note (perfumery)))

In a good perfume, these stages do not arrive cleanly one after the other. They overlap. By the time the top notes have lifted, the heart is already singing through them, and a hint of the base is quietly underneath. The pyramid is a story of overlap, not of replacement.

Where the pyramid idea comes from

The concept of organising a perfume into three vertical layers based on volatility is usually traced to Jean Carles (1892–1966), a French perfumer who worked at the great Grasse house of Roure (later absorbed by Givaudan). In 1946, Carles founded the Roure perfumery school, where he taught a methodical, step-by-step approach to composing fragrance: build the base first, then the heart, then the most volatile top. The structure was teachable, and so it spread. (Wikipedia: Jean Carles)

That is worth knowing because it tells you something important: the pyramid is a teaching model and a marketing language. It is not a law of nature. Real perfumes are continuous compositions where dozens of materials are doing dozens of things at once. The pyramid is the easiest way to talk about that complexity — for perfumers in training, and for the rest of us trying to read a fragrance note list.

What the pyramid does not tell you

The pyramid is useful, but it is not the whole picture. A few honest caveats:

• The numbers are approximate. Different sources give different timing ranges. "Top notes last 5 to 15 minutes" is a reasonable rule of thumb, not a guarantee. Your skin, the temperature, the humidity, what you ate, and the materials themselves all shift those times.
• Some materials live in more than one tier. Many naturals — rose absolute is a good example — contain compounds of very different volatilities. A rose can read as both heart and base in the same perfume.
• Note lists are marketing language. When a brand publishes "top: bergamot, heart: rose, base: sandalwood," that is a useful guide to the impression of the fragrance, but it is not a recipe. A real formula can have dozens of materials, some of which are never named on the box.
• The pyramid does not describe quality. A fragrance can have a beautifully drawn pyramid and feel cheap on skin, and another can be quietly built and feel extraordinary. Structure is not the same as craft.

If you are interested in why what the box says and what your skin produces can differ so much, we wrote about why a perfume smells different on different people.

And what is sillage?

Once you understand the pyramid — the way a perfume changes over time — the next question is about space. How far does the scent travel around you?

That is what sillage describes. The word is French; it means wake, as in the trail a ship leaves behind it in the water. In perfumery, sillage is the scent trail a fragrance leaves in the air as the wearer moves through a room. (Wikipedia: Sillage (perfume)))

It is pronounced roughly see-yazh.

Sillage is not the same as projection, even though the two are often blurred. The clean distinction is this:

• Projection is how far a fragrance radiates outward around you while you are standing still. A high-projection perfume is one a person across the table can smell.
• Sillage is the trail you leave behind you as you move. A high-sillage perfume is one a person can still smell in the corridor after you have walked through it. (Wikipedia: Sillage (perfume)))

In practice, sillage is a function of the materials and the concentration. Heavy base notes — certain musks, ambers, resinous woods — diffuse persistently and leave long trails. Bright, citrus-driven top notes do not. A high-concentration perfume tends to project and to leave sillage more than a light eau de cologne, although composition matters more than percentage alone.

Some people prefer big sillage; some prefer almost none. Neither is better. They are different intentions.

How we think about notes and sillage at SHŌ ITO

We build our perfume as an extrait de parfum, in 50ml, and we make a small number of compositional choices that come from a clear point of view about how a fragrance should sit on a person.

We are not interested in big sillage. We do not want the perfume to fill a room or announce itself in a corridor. We want it to live close to the skin — to be noticed when someone leans in, and not before. That choice shapes the materials we work with: we lean on heart and base notes that hold for hours without shouting, and we treat the opening as a doorway rather than a fireworks display.

It also changes how we think about the pyramid itself. Because we are working at this intimate distance, the heart and base have to be honest. There is no projection to hide behind. If the base is thin or the heart is rough, you will smell it. That is one of the reasons we let our finished perfume rest for a long maceration period before we bottle it — so the structure has time to settle into something integrated rather than layered. We wrote about that in our piece on maceration.

And on concentration: extrait de parfum gives us the depth we need for the heart and base to carry through a day at close range. We have a separate piece on the difference between eau de parfum, eau de toilette, and extrait, if you would like to understand that choice in more detail.

The short version

• The fragrance pyramid describes how a perfume unfolds over time: top notes (lightest, ~5–15 minutes), heart notes (the main body, several hours), base notes (the long tail, many hours).
• The stages overlap. A perfume is a continuous composition, not three separate fragrances.
• The model is usually traced to Jean Carles in mid-20th-century Grasse. It is a useful teaching framework, not a law of chemistry.
• Real-world timing varies by skin, temperature, and the materials themselves. Note lists are guides, not recipes.
• Sillage is the scent trail you leave behind you as you move. Projection is how far a perfume radiates around you while you stand still. They are related but not the same.

If you would like to go deeper into how the inside of a perfume is made, our piece on maceration is a natural next read.

We write a short letter on the world of fragrance each week. If that sounds like your kind of thing, you are welcome to join us at shoitotokyo.com.