Citrus

Citrus scents, called hesperidic in the trade after the botanical name for the citrus group, build on cold-pressed peel oils. These include bergamot, lemon, mandarin, grapefruit and the blossom note neroli. Those oils are made of small, light molecules. That is exactly why they lift the moment they hit skin. It is also why they are gone within 15 to 30 minutes on their own.

Structure follows from that. The classic format is eau de cologne at roughly 2 to 5 percent perfume oil. It is meant to be splashed generously and reapplied through a hot day rather than dosed sparingly. Modern citrus fragrances anchor the top notes with musks, woods or vetiver in the base, which buys hours the peel oils cannot provide. Expect two to four hours of real presence even from an eau de parfum in this family.

Short life is the trade, and no concentration fully fixes it. Carrying a small decant for a midday respray is the practical answer. One caution applies outdoors. Some citrus oils leave skin more sensitive to sunlight and can produce darker patches where sprayed. In strong sun put the fragrance on clothing or on skin that stays covered. Spraying onto moisturized skin also slows evaporation and adds noticeable wear time.