This is for a 5ml manufacturer roll-on bottle of Alkemia Perfumes fixative perfume oil. If you skin seems to drink fragrances or if you have to reapply your favorite scents over and over, a perfume fixative may help. Fixatives are used in perfumery to retain fragrance on the wearer for as long as possible by slowing down the evaporation rate of the perfume's aromatic components. It is important to note that Alkemia's fixative is NOT odorless (the smell is reminiscent of a slightly wintergreeny musk that dries down to a soft powder with a touch of papery vanilla). The scent should be able to blend well with most perfumes (including non-Alkemia ones) without throwing the composition too far out of balance.