A composition for application to the skin or other substrate, either prior to, or subsequent to, a perfume, wherein the composition increases the intensity of the perfume five hours after application of the perfume by at least 10% compared to the intensity of the perfume in the absence of said composition is provided. The composition may comprise a musk substance and at least 50% of a non-scented, viscous, low-volatility solvent for perfume ingredients. The solvent may be diethyl phthalate, isopropyl myristate, monopropylene glycol or dipropylene glycol, preferably diethyl phthalate. The musk substance may be a C14-C18 macrocyclic lactone, preferably omega-pentadecalactone. A method for increasing the longevity of a perfume product, wherein said method comprises applying said composition to a substrate prior to, or subsequent to, the application of the perfume product to the substrate is provided.
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