A note is not an ingredient. That is the first thing we wish someone had told a new buyer, because almost every mistake a new buyer makes starts with assuming otherwise.
When a bottle says it contains rose, that may mean rose oil, or rose absolute, or a rose accord built entirely from other materials, or nothing rose-related at all beyond an intention. All four are normal. None of them is lying, exactly, because the word describes a smell rather than a shopping list.
So let's take the thing apart properly: notes, accords, the pyramid, and then the part where we tell you the pyramid is at least half a marketing device.
Notes
A note is a smell you can name. Bergamot, leather, vanilla, cut grass.
Some notes correspond to a material you could hold. Bergamot oil is real, pressed out of a real fruit. Others exist only as reconstructions. Lily of the valley is the famous one, from our history of perfume guide, because the flower yields nothing when you try to extract it, so every muguet note in every fragrance ever sold was built out of other molecules. Same for lilac, peony, freesia, most fruit that isn't citrus, and anything described as "sea air" or "rain."
There is no rain. Somebody built rain.
This is not a scandal and it is not cheating. A reconstruction can be better than the extract, more stable than the extract, and available in January. What matters for you as a buyer is that the word on the box describes the destination and tells you nothing about the route.
How you build a smell you cannot extract
To build a note like lilac, which yields nothing when you try to extract it, perfumers go and measure it instead. The technique is called headspace, and it was pioneered by Roman Kaiser, a Swiss chemist who has worked at Givaudan since 1968 and has been applying the method since 1975. You put a glass container around a living flower, leaving it alive and attached to the plant, and pump the air around it through a trap that catches the volatile molecules. Then gas chromatography tells you what those molecules are. The flower is unharmed. You now have a list.
The list is not the answer, because knowing which forty compounds a lilac emits does not tell you which eight of them your nose actually cares about. A perfumer still has to decide. But it turned reconstruction from guesswork into a problem with data in it.
Kaiser has spent years doing this to rare and endangered plants, and published the results in a book called Scent of the Vanishing Flora. Somewhere there is a recorded formula for the smell of a plant that may not exist much longer. We find that worth the price of the technology on its own.
Accords
An accord is the term most buyers never learn, even though it explains more about how a fragrance is actually built than any other term here.
An accord is two or more materials combined so that they stop smelling like themselves and start smelling like a third thing. The usual comparison is a chord in music: strike three notes together and you hear one sound rather than three.
The fougère is an accord. Lavender, oakmoss and coumarin, put together by Paul Parquet in 1882, produce something that does not smell like lavender or moss or hay, and does not smell like ferns either, despite the name.
Perfumers do not think in notes. They think in accords, and a finished fragrance is usually a small number of accords arranged against each other. When you read a note list with nineteen items on it, you are reading a description written afterwards, for you, of something that was built as maybe four ideas.
The pyramid, and the man who built it
Top notes, heart notes, base notes, drawn as a triangle. Every fragrance page on earth uses it.
It comes from Jean Carles, the perfumer who died in 1966 and whose training method still runs through this industry.
Carles ranked perfumery materials by volatility, from the lightest and fastest to the heaviest and most persistent, and turned that ranking into a way to teach and a way to compose. His actual method builds a fragrance from the bottom up: blend the base first, then the heart, then the volatile top.
The pyramid started as a working procedure for perfumers and a teaching aid for students. It was never a promise to a customer about what would happen on their wrist over the next eight hours. Then marketing got hold of it.
What actually happens on your skin
Everything evaporates at once. That is the correction.
A fragrance does not move through three acts. Every material in the bottle starts evaporating the moment it hits air, and they simply do it at different speeds, so what reaches your nose is a continuously shifting mixture, weighted at any moment toward whatever is still evaporating fastest. Small light molecules go first. Large heavy ones are still going hours later.
That produces something that resembles the pyramid if you squint. It is not three stages, it is a gradient, and the difference matters when you are testing, because you will spend twenty minutes waiting for a "heart" to arrive that has been there the whole time.
Now the claim you will see everywhere. Top notes last fifteen minutes.
Sources put the range at roughly five to thirty minutes, and it depends heavily on the fragrance and the person. Some citrus openings are gone in four minutes. Some stay an hour. Fifteen minutes is a rough average that got repeated until it became a rule, and treating it as a rule is how people end up buying a fragrance on the strength of an opening they were told to ignore.
Not every fragrance even has a shape
Some fragrances are deliberately linear. They smell substantially the same from spray to death, and that is a design decision rather than a failure.
Elena Vosnaki makes this point well: the pyramid is a rough blueprint rather than an analytical map, and plenty of modern compositions are built as a single sustained statement, held up by powerful materials that carry from beginning to end. She names Sophia Grojsman as the perfumer who brought a linear, minimal style into the mainstream, and points at Giorgio and White Linen as fragrances that hold one idea rather than travel.
The old chypres work the other way and also break the model. In a classic chypre the bergamot, the labdanum and the oakmoss are meant to be heard together from the first minute, as one accord, not handed off in sequence.
Mitsouko is the reference case for this. Spray it and try to find the three stages. You will not, because it was not built that way.
Linear is not lesser. It is a different answer to the question of what a fragrance should do with your day.
Why the published note list is not a recipe
Nobody is required to tell you what is in a fragrance, and almost nobody does.
In the United States, fragrance and flavour ingredients can be listed on a label as the single word "fragrance," because the labelling rules cannot be used to force a company to disclose a trade secret. One word can stand for dozens or hundreds of individual materials. Perfume formulas are among the most protected trade secrets in consumer goods, for the obvious reason that a formula is the entire asset.
The Environmental Working Group, an advocacy organisation rather than a neutral one, tested seventeen brand-name fragrance products and reported an average of fourteen chemicals per product that did not appear on the label, thirty-eight across the set. We are flagging their position because you should weigh who is telling you a thing. The disclosure gap itself is not in dispute; it is written into the regulation.
So where do published note lists come from? The house's marketing department, mostly, passed to retailers and databases and repeated. That is why a note list can be poetic, why it can name materials that are present in undetectable amounts, and why two sources sometimes give different notes for the same bottle.
There is a specific version of this in the clone market: it looks like evidence and is not. Houses at that end of the market often publish the original fragrance's note pyramid rather than disclose their own formula. A note list that matches an original exactly is a marketing decision, not proof that the contents match.
Eau de toilette, eau de parfum, and the thing nobody tells you
The concentrations are usually explained as a ladder. Cologne weakest, then eau de toilette, then eau de parfum, then parfum or extrait at the top, with each step holding more aromatic oil in less alcohol.
That much is broadly right and it is also the least useful part of the answer, because it implies the EDT and the EDP of a fragrance are the same liquid at different strengths. Frequently they are not. They are different compositions that share a name and a family resemblance.
Sauvage is the example everyone can check. Compare the published note lists across the versions. The eau de toilette runs bright and peppery on bergamot, Sichuan pepper and ambroxan. The eau de parfum leans warmer through the base, with more vanilla, pulling the fragrance warmer and slightly sweet in a way the EDT never goes.
Liking the EDT tells you less than you think about whether you will like the EDP. They are relatives, not the same person at different volumes. Try before you upgrade.
And "stronger" is not the same as "lasts longer" or "better." A higher concentration usually does last longer, but a heavy base in an EDT can outlast a bright EDP easily. Concentration describes how much material is in the alcohol. It does not describe which materials.
This is also where reformulation hides. Dior has changed formula codes and materials on both the Sauvage EDT and EDP over the years. That last claim comes from enthusiasts comparing batches rather than from Dior, so treat it as well-attested community observation and not as fact from the house. Our guide to why fragrances change deals with reformulation properly.
What you can actually rely on
Not much on the box. Rather more on your arm.
Trust the smell over the list. The list is a description of intent written by someone who wants your money. Your nose has nothing to sell you.
Read note lists as a direction, not an inventory. A list heavy with citrus, lavender and moss tells you roughly where the fragrance is pointed. It does not tell you proportions, quality, or how much of anything is really in there, and proportion is most of what determines whether you like something.
Ignore the pyramid's timings. Wear the thing for a full day before deciding. Our guide to testing perfume goes into how to test properly, and it is the guide that will save you the most money.
One material at a high dose beats a long list. Bandit is mostly one bold idea. Fracas is mostly one bold idea. A nineteen-item note list is often a sign that nobody could decide what the fragrance was about.
Our guide to the fragrance families sorts fragrances into families next: that is the map most people actually use when they shop. Then our materials guide takes the materials themselves one at a time, and that is where note lists finally start meaning something, because you will know what the words refer to.
Part of Nose to Bottle, our complete fragrance manual. Read it in order here.