Looking for a new fragrance? Whether it is women's best perfume, most popular perfume, or men's cologne, they all will be made with a different concentration of fragrances. This is the reason for different pricing variations within sizes. With all the perfume scents available today, shopping for a new fragrance can be a bit confusing. When you look at a bottle of perfume, under the title will usually be the concentration of the fragrance. The concentration will signify the strength of the perfume. Perfumes with a higher fragrance concentration contain more perfume oils and less alcohol. The concentration of fragrances is in several categories consisting of parfum, eau de parfum, eau de toilette, eau de cologne, and eau fraiche.