Red Ridge Performance Eye Gear, like Red Ridge Hammer Sunglasses, are built for the kind of adventure life throws at you, literally. Beginning with their high-impact resistant injection polarized polycarbonate lenses. The decentered optics allows optimal visual acuity by creating the optical center of the lens where your eye focuses. This technology makes seeing through a pair of Red Ridge unlike other ordinary sports glasses--with a view of the world you'll enjoy wearing all-day long no matter what you're taking on. All frames are constructed from TR90 Grilamid nylon made in Switzerland. This lightweight and extremely strong material makes it the perfect choice for athletes, adventurers or people who just want the best eyewear available. 100% UVA, B and C filtered lens protects from the sun's damaging rays. Pure PVA polarizing wafer absorbs reflected glare allowing you to see better than ever.