Oakley Flak 2.0 XL Clear Black Photochromic

Photochromic Lenses
A premium option for select single-lens eyewear designs, it darkens the lens automatically to help you adapt to changing light and always perform at your best. Note that even when the lens color lightens, it still filters out 100% of all UV.

Clear Black Photochromic:
Light Transmission: 23%
Light Transmission (Activated): 69%
Light Conditions: Changing Conditions
Contrast: Neutral
Base Lens Color: Clear