With their lightweight construction and ultimate convenience, the Optic Nerve Omnium sunglasses are quickly becoming a heavyweight favorite. . . Featherlight, minimalist design weighs less than one ounce-youll probably forget theyre even on your face. Performance IC Deuce Grey lens for bright sun conditions offers true, accurate color definition, but virtually no definition or contrast properties; 15% light transmission (the lower the number, the darker the lens). Performance IC Deuce Copper lens for variable light conditions offers excellent acuity, contrast, and color definition; 27% light transmission. Precision optics and 100% UVA/UVB sun protection. Polycarbonate lenses for high impact resistance. Hydrophobic coating protects lens from water, oil, dust, and sweat for cleaning ease and durability. Durable, resilient Grilamid TR90 nylon frame material for enhanced performance with a snug, secure, and comfortable fit. Lenses meet ANSI Z80.3 standards for optical clarity, impact resistance, and UV protection. Ideal for casual use as well as more extreme adventures. Storage pouch included