You're barreling down a new mountain biking trail, trying to keep up with your friends, unsure of what's around the next corner, realizing the only reason you haven't gotten tossed yet is the fact that you're wearing the Oakley Flak Jacket XLJ Prizm Sunglasses. Oakley's endless need to innovate has resulted in Prizm lens technology, which regulates the transmission of light to provide colors that maximize contrast and visibility, so you're able to spot every rock, branch, gap, and woodland creature with a death wish that comes across your path. And if you do so happen to miss a certain low hanging branch that's intent on taking you out, the resilient Plutonite lenses and tough as nails O Matter frame have insanely high impact resistance to ensure long lasting eye protection, crash after crash. The Three Point fit keep these shades snug, and comfortably in place, while eliminating pressure points normally found in glasses that hook around your ears. And when those dark and ominous clouds finally open up, the soft, hydrophilic, synthetic Unobtainium earsocks and nose pads increase their grip the slicker conditions get. With a wet finish to the ride, there's inevitably going to be some mud splatter on your specs, so just wipe them down with the included cloth and toss them in their case until next time.