I wanna know this one too, I recently got the Oakley Half Jacket 2.0 as a gift with non polarized lenses.
I'm still getting used to them as I never use glasses of any kind, but I must say they are growing on me, especially when playing in the morning.
About the polarized lenses for tennis I've seen mixed reviews, some say they are a must because hard courts reflect a lot of glare while others say they will mess with depth perception.
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