These Oakley Flak 2.0 XL Prizm Polarized Sunglasses are all about sports performance. Whether you're surfing, cruising the lake on your boat, racing your bike, or hoopin' it up outside, ensure you aren't squinting all day. The Flak 2.0 model is designed to provide 100% UV protection with a lightweight and durable design. The lens on the SI Flak 2.0 has a light transmission rate of 17% to give you the clarity you need in any bright-light conditions. Whether you're on the road or on your feet, you can traverse confidently with the clearest of vision. The XYZ Optics show off razor-sharp clarity, a Prizm gray polarized lens, and a standard fit. Get outside and do all the sporty things in these Oakley Flak 2.0 XL Prizm Polarized Sunglasses.