Shopping for new perfume can be overwhelming with all of the scents available. Not only are there countless scents available, there are also different fragrance concentrations. Underneath the name of the perfume on a bottle will normally be the fragrance concentration. A fragrance concentration refers to the strength that a fragrance has. Perfumes with a higher fragrance concentration contain more perfume oils and less alcohol. Fragrance concentrations are broken into categories including parfum, eau de parum, eau de toilette, eau de cologne, and eau fraiche.