Top, Heart and Base Notes: The Fragrance Pyramid

A perfume unfolds in three stages. Top notes are what you smell first and fade within roughly 15 minutes to an hour. Heart notes take over for the next few hours and carry the main character. Base notes develop last and stay on skin for the rest of the wear.

Together these three layers are called the fragrance pyramid, after the shape: a small, bright top on a fuller heart, both resting on a wide, heavy base. Knowing which stage you are smelling explains why a perfume can seem to change completely between the first spray and the end of the day.

Why perfume changes as it dries

The stages come from chemistry. Every perfume material evaporates at its own speed. Small, light molecules leave the skin quickly, so they reach your nose first and disappear first. Larger, heavier molecules evaporate slowly, so they stay in the background early on and become noticeable once the lighter ones have gone.

Perfumers build around this. They choose materials for each stage so the scent moves from one impression to the next on purpose. In a well-made perfume each stage leads into the next, and the base fades slowly instead of collapsing into something flat.

What goes into top notes

Top notes are bright, sharp and fleeting. Citrus is the classic example: bergamot, lemon, mandarin and grapefruit all lift off the skin fast. Aromatic herbs such as lavender, mint and basil, light spices like pink pepper and cardamom, and green or watery accents also sit here. Their job is the first impression, the part you notice on a blotter in a shop.

Because they are gone within the first hour, top notes are the least reliable guide to whether you will like a perfume. A sparkling citrus opening can sit on top of a heavy, sweet base that smells nothing like the first spray.

What goes into heart notes

Heart notes, also called middle notes, appear as the top fades and usually last several hours. This is where most of a perfume's identity lives. Florals dominate the category: rose, jasmine, iris, orange blossom and tuberose. Fruits such as peach, plum and blackcurrant, and warmer spices like cinnamon and clove, are also common heart materials.

When people describe what a perfume "smells like", they are usually describing its heart. Many fragrance families take their name from this stage too: a floral is a floral because of its heart. Others are defined lower down, such as chypres, which rest on a base of oakmoss and patchouli.

What goes into base notes

Base notes are the foundation. They are made of heavy materials that evaporate slowly: woods like sandalwood, cedar and vetiver, resins such as benzoin, labdanum and frankincense, along with musks, vanilla, tonka bean, amber and patchouli. They are present from the start, but you mostly notice them after a few hours, and they can last well into the next day on clothing.

Base materials also act as fixatives. They slow the evaporation of the lighter notes around them, which is one reason perfumes with a rich base tend to last longer. The guide to perfume longevity covers the other factors.

The notes perfumers use most at each level

These are the notes that appear most often in each position across the perfumes listed on Aromifo, counted by how many perfumes include them.

Top notes

The most common top notes are Bergamot, Lemon and Mandarin orange.

Heart notes

The most common heart notes are Jasmine, Rose and Lily of the valley.

Base notes

The most common base notes are Musk, Amber and Sandalwood.

How to read a fragrance pyramid on Aromifo

Every perfume profile shows its pyramid with top, heart and base notes listed separately, and each note links to its own page. A note page lists the perfumes that use it, so if one material keeps appearing in perfumes you love, you can browse from that note to others built around it. The full index is on the fragrance notes page.

Read the pyramid from the bottom up when you are deciding whether to buy. The base tells you what you will live with for most of the day. The heart tells you the main character. The top tells you only how the first few minutes will feel. Next to the pyramid, the accord bars on each profile show how members describe the overall scent, which is often a better summary than the note list itself.

Why some perfumes list only a few notes

Some perfumes do not have a classic three-stage pyramid. They are listed with a single group of notes instead. These are usually linear compositions: perfumes designed to smell much the same from the first spray to the drydown. Many modern niche perfumes and skin scents are built this way, often around one or two materials such as a musk, an amber or a single wood.

Linear perfumes can be just as carefully made as pyramid ones. They smell much the same all day, while a pyramid perfume changes as it dries down. Brands also choose how much to disclose, so a short note list can mean the house published fewer details.

How to test a perfume through all three stages

• Test on skin, not paper. Paper strips show the top notes well but cannot show how the scent reacts with your skin.
• Wait 20 to 30 minutes before judging. By then the top notes have faded and you are smelling the heart.
• Check again after a few hours. The base is what you will smell for most of the day, and it decides whether you will keep wearing the perfume.
• Test one or two perfumes at a time. Spray them on different wrists or arms so they do not mix.
• Skip rubbing your wrists together. It warms the skin and speeds up the top notes, so you miss part of the opening.

Once you know which stage you enjoy most, perfume shopping becomes easier. If you love openings, look for bright citrus and aromatic compositions and plan to reapply. If you care most about the drydown, focus on the base notes and on the sillage and longevity votes on each profile.