WHAT I SMELL:  Imprévu opens with lemony tinged aldehydes that quickly become entrenched in the most beautiful oak moss in addition to a more rounded citrus.  Soon enough, the perfume moves from the citrus and becomes lightly creamy with pulsating florals.  There’s also a spiced note that gives the perfume a bit of exoticness.  At this stage, Imprévu’s heart is deep, warm, a bit mysterious and incredibly alluring.  After some time, a light soapiness emerges, but that soon dissipates and that’s when the real magic happens.  Around 10 minutes into wearing the perfume, a light rich leather melds with the deep and warm florals and the perfume begins to dry with a powdery oakmoss.  The perfume is so beautiful at this point with its warm, in charge and take no prisoners personality.  Imprévu in french means “unforseen” or “unexpected.”  The perfume is exactly that… but in the most wonderful of ways.

From Fragrantica:

Imprévu was launched in 1965 as an intense female perfume that ideally balances the chypre, wood and leather aromas.  Absolutely mature and opulent, it opens with aldehydes and citruses like bergamot and bitter orange.  The heart is composed of leather with traces of clove and floral notes, placed on a wooden base with oak moss.