Native Eyewear Nano2 2008 Sunglasses plastic Rhyno-Tuff Nylon frame Carbonate lens Polarized Polarized Lens: Optical quality impact-resistant lenses that block 100% of the harmful UV light and eliminate glare for sharp, clear vision with increased contrast and depth perception Glare Free Vision: All of Native's Polarized Crystal Carbonate Lenses incorporate a Polarized Filter which absorbs the Horizontal light thus eliminating Glare Cushinol Temple Boots: The Proprietary Composition of Cushinol creates a Non-Slip Grip that keeps Sunglasses in place during Athletic Activity Unbeatable Lifetime Warranty: Includes Scratched Lenses Sportflex + Optic Gear Kit