"Oakley® Flak 2.0 XL PRIZM Black Sunglasses: These unisex performance sunglasses are built for runners, cyclists, and outdoor athletes who train in bright-light conditions and need sharp visual clarity without glare. The Prizm™ lens technology enhances color, contrast, and detail so you pick up more definition in the road surface, trail features, and surrounding environment. With just 11% light transmission and a polarized grey base, these lenses cut through harsh sun and reduce glare during road running, outdoor training, and any high-sun activity where visual performance matters.The extended lens coverage of the XL frame geometry - built on an 8.75 base curve with High Definition Optics™ (HDO™) - keeps every part of your field of view sharp, not just the center. The lightweight O Matter™ frame stays comfortable during long wear, while Unobtainium® earsocks and nosepads grip better as moisture builds, so the fit stays secure even as you start to sweat. Ellipse metal icon accents add refined detail without bulk. Both a protective hard case and soft vault are included for storage at home and on the go.Why Our Fit Experts Love It""I wore these on a long sunny run and the Prizm™ lenses made a noticeable difference - road surface detail was sharper and the fit stayed put even as I started to sweat. The Unobtainium® earsocks really do grip better the more you move."" - Michael, Road Runner Sports Fit Expert, Seattle WAWho It's Best ForThe Oakley® Flak 2.0 XL PRIZM Black Sunglasses work best for runners and cyclists who spend time in bright conditions and want a secure, high-contrast view throughout their activity. If you train on sunny roads, compete outdoors, or spend long hours in high-sun environments where glare and visual clarity are concerns, these sunglasses deliver the lens performance and secure fit you need. This unisex style works across a range of face shapes and activity types. VIP Family members can take the Flak 2.0 XL PRIZM Black Sunglasses for a 90-Day test drive with our Perfect Fit Guarantee."