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.
Oakley Flak Jacket 13-727 with Polarized Lenses
36 Review
The Ultimate Ski Mask: The Friendly Swede Balaclava Face Mask For Men And Women - Perfect For Standard, Nordic, And Arctic Conditions!
41 Review
Polarized Aviator Sunglasses For Men With Military Style By SUNGAIT
36 Review
Garment Washed Cotton Twill Mesh Cap For Big Heads By E4Hats.Com
45 Review