It's a simple trick that serves no other purpose than to impress your friends, but that doesn't make these sunglasses from Parabellum and Oliver Peoples any less awesome. The shades feature almost no branding, until you breathe on and fog up the lenses—then the company's logo is conspicuously revealed.

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It's a neat trick, but neat enough to warrant a $695 price tag? Probably not.

[Parabellum via Notcot]