Classification by Notes Structure

???? Top Notes

• First impression (0–15 min)
• Light & fresh
  Examples: Citrus, herbs

???? Middle Notes (Heart)

• Main character (30 min–4 hrs)
• Defines the scent
  Examples: Floral, spices

???? Base Notes

• Long-lasting foundation
• Depth & richness
  Examples: Oud, vanilla, musk, woods