Inspired by the American mountain lion, the Catamount Polarized Sunglasses from Native Eyewear feature a semi-rimless frame, adjustable nose pads, and the most innovative polarized lenses on the market, which block up to four times more infrared light than regular polarized lenses, provide UV protection up to 400nm, and deliver high contrast, crisp definition and peak visual acuity by reducing blue light and selectively filtering UV rays. Lens material: N3 Polarized Polycarbonate. N3 Lenses block up to four times more infrared light than regular polarized lenses, pass Z87.1 testing, provide UV protection up to 400nm.. SportFlex