Each perfume, Eau de Parfum, Eau de Toilette, Eau de Cologne or Eau de Solid is made with fragrance oils and alcohol. The oils serve as a carrier of the fragrance, whereas the alcohol forms a bridge between oil and skin. The individual categories reflect the ratio between oil and alcohol. Perfume has the highest oil content with 15%-30% and eau de solid with 1%-3% the lowest. Despite the differences in the quantity ratio, each fragrance component traditionally unfolds gradually according to the so-called fragrance pyramid. This consists of head, heart and base notes.