Be prepared and ready with the Oakley SI Flak Jacket XLJ Prizm Sunglasses. The lightweight, rugged O Matter frame material maximizes comfort for all-day wear, while being extremely durable and tough enough for anything you take on. Hydrophilic Unobtainium material at the nose pads and stem sleeves provides a secure fit, even in wet conditions, ensuring that the sunglasses stay securely on your head. The Three-Point Fit system helps hold the lenses in precise optical alignment. Plutonite lenses blocks 100% of all UVA, UVB, UVC and harmful blue light, while SI Prizm lens technology uses formulated dye compounding to produce a color-tuned lens specifically for shooting. This helps boost visual recognition of targets while blocking a variety of neighboring backgrounds such as dirt, trees, and sky. With the Prizm lens technology, the shooter has reduced eye fatigue and strain, and also an improved ability to see reticle patterns under scopes more clearly. Oakley's High Definition Optics technology extends razor-sharp clarity at all angles of view and maximizes peripheral vision. The SI Flak Jacket XLJ Prizm frame and lenses exceed ANSI Z87.1 standards for impact and optical requirements, so you don't have to worry about your sunglasses holding up under intense conditions. Metal icon accents add to the already futuristic design for a look that is sure to wrap your eyes in style.