Terre d'Hermès Pure Parfum is the only scent that made me survive the season I hate most: summer.
I apply this potent fragrance heavily on my upper body and spray it to the neck; the scent then forms an impenetrable armour around me, not unlike Frodo's mithril-shirt. Thus all the adversities of summer - huge amounts of sweat washing away any cologne one puts on, clothes sticking to the skin, feeling smudgy etc. - shall have no dominion.
Only since I know that the Pure Parfum can do this I have a lot easier times with summer. At the moment I own two bottles of it (75ml and the gorgeous 200ml-bottle which is a veritable murder-weapon) and plan to stock up soon to prevent me from any possible reformulation-mournings in the future.