Dirdy Bird Peak Sunglasses Stealth Black, Photochromic, Clear To Smoke Transition LensDirdyBird Active Peak sunglasses are built to handle the most extreme conditions. From chill days on the lake to conquering mountains, the Peak model delivers. Created from over 35 years of passion, innovation, and R&D in the eyewear industry. We have developed a glass that does it all. Lens: polycarbonate 100% uva uvb protection with ir cut technology Unmatched, ultra xdo clarity Frame: propionate nylon based, hypoallergenic and softtac coated