Since you mention Oakley, I have some A-Wires with Black Irridium lenses that are both pola and tinted, totalling 9% transmission (they need repair now, but hey...).

Anyway, they're the best high-altitude glasses I've ever had. They stay put on my face and provide very good coverage.

FWIW light reflecting from the snow and water and to an extent from haze is polarized, and polarized lenses definitely help cut glare and enhance details. But a solely polarized lens does not provide a 90% block, which is why it should also be tinted, otherwise transmission can be as high as 35%.

Cheers,
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--Rick