Walleva Replacement Lenses for Spy Optic DIRK Sunglasses - 6 Options Available 100% Polarized (For Polarized Lenses Only, Reduces Glare and Enhances Contrast) 100% UV Protection (Exceeds ANSI Z80.3 and EN 1836:2005 Standards) 16% Light Transmission, 12%-40% (For Photochromic Lenses), 99% (For Clear Lenses), 75% (For Yellow Lenses), 36% (For Pink Lenses) ImpactResistant-PassedFDADropBallTestandZ87.1Test(ForMr. ShieldPolarizedLensesandNon-PolarizedLenses) Walleva Repel Coating (Repels Dust and Water)