We proudly introduce our highest quality sunglasses lenses – the Mr. Shield lenses. All Mr. Shield lenses are made of polycarbonate and are polarized, which can provide the best optical characteristics: high clarity, high contrast and high comfort. Mr. Shield stands for Multi-Resistant Shield, meaning the lenses have great resistance to impact and corrosion. a. Anti-seawater: remain perfect condition after soaking into sea water for 24 consecutive hours b. Anti-chlorine water: remain perfect condition after soaking into chlorine water (such as swimming pool water) for 24 consecutive hours, making the lenses suitable for swimming c. Highest safety: meet Z87.1 standard, which is the impact resistance standard for safety glasses. d. Walleva extra repel: With a hardened oleophobic and hydrophobic layer, Mr. Shield not only resist scratching, repels dirt and water, but also repels oil, smudges and fingerprints. Mr Shield 100% guarantee you will have the best clarity vision during using. Mr Shield lenses have the following features that bring you extra value. 1. UV protection Remove 100% of ultraviolet (UV) rays, such as UVA, UVB and UVC, preventing damage to the skin of your eyelid, the cornea, lens and other parts of the eye. 2. Polarized Remove glare, bring high contrast and high clarity and high comfort, making the lenses perfect for fishing, driving, riding, hiking and other outdoor activities as well as daily wearing. 3. Impact Protection Mr Shield lenses are tested under extreme circumstances to guarantee uncompromising protection against high-mass and high-velocity impact. All Mr. Shield lenses meet ANSI-Z87.1, the impact resistant standard for ballistic eyewear. 4. Taper Corrected Provide 100% natural undistorted vision through compensating the curved shape by variable thickness from center to edge.