Will fall’s It bag be….a sunglasses case?

Roberto Cavalli hopes so.

His limited edition ‘Eva’ shades - named for his wife - go on sale October 15th, with a hefty price tag of $640 - most of the brand’s current pairs retail for $300-$450.

But the press release points out that “The original packaging, created exclusively for the “Evaâ€? sunglasses, is covered in leopard print champagne colored satin and decorated with the RC monogram logo in bronzed metal. The case can also be used as an evening clutch or shoulder purse.”

Clearly, Cavalli expects the case to be a selling point. Perhaps they’re anticipating women rationalizing this way:

$640 is a lot, even for designer sunglasses…

But not so much compared to the price of a regular designer purse (a Cavalli clutch will usually set you back $1000).

And if you deduct the price of a normal pair of Cavalli shades ($340), you could say that you’re getting a Cavalli bag for $300 or less…

We know some girls who do similar arithmetic when it comes to justifying buying Dior make-up (pricey eyeshadow, “free” bag).

Are you convinced by their math?

—ANNA FIELDING GRIGGS