I would put zero if possible. First, there is no Oakley warranty card in the box. Second and foremost, I believe these are fake. Lenses are not polarized as described. I've spent a few days on the street with a lot of glare and my eyes are burning, it takes a lot of eye drops to calm them down. I've tried rotating to induce polarization on several subjects and it never blocked the light. Another complaint; It just doesn't have spring hinges to allow for better outward flexing like my Oakley Square Wire Titanium.
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