Concentrations Explained: Parfum, EDP, EDT and EDC

The difference between Parfum, Eau de Parfum (EDP), Eau de Toilette (EDT) and Eau de Cologne (EDC) isn't just a fancy name on the bottle — it's mainly the percentage of concentrated perfume oil dissolved in alcohol, and that percentage is what decides longevity, projection (how far it can be smelled), and even how the notes evolve throughout the day.