I’m sure you’ve seen a knock off or 2 of these in Nordstroms but these are the real thing.  The way you can tell is A) it says Carrera instead of nothing and B) there is a wire wrap line around the top of the glasses instead of a cheesy white painted line.  Black lenses, and a cool little bubble Carrera logo above the bridge.  Awesome!

GET IT HERE:
http://www.ssense.com/men/product/carrera/naska_1_8vr-3c_sunglasses/28660