Native Eyewear Griz Sunglasses - The grizzly is one of North Ameria's largest and most iconic species, which is why it serves as the inspiration behind GRIZ. This frame is the largest in the NATIVE product line and the first active piece we designed with side venting. Like its namesake, you might find this frame trailblazing in the Beartooth Mountains or patiently waiting along the river for its next lucky catch. The most innovative and advanced polarized lens on the market. N3 lenses block up to 4X more infrared light than regular polarized lenses, pass Z87.1 testing, provide UV protection up to 400nm, and by significantly reducing blue light and selectively filtering UV, they deliver high contrast, crisp definition, and peak visual acuity