Ultra Hydro(TM) is a 100PercentA(R) exclusive dual-action hydrophobic treatment that is applied to an Ultra HDA(R) lens to create a 2H Surface Hardness rating-the result is a lens that sheds water instantly.Element Repel - Water, spray, and salt-spotting slide off instantly for a clear line of sightImpact Tough - Enhanced 2H surface rating shields against micro-scratches and debrisExtended Life - Superior coating durability keeps your optics "factory fresh" longer Lens Type: Ultra Hydro The Ultimate Durability: Ultra Hydro is a dual-coated lens technology that sheds moisture to keep the lens clear. For the absolute most rain and mud repellant 100% Armega/ARmatic Lens, click HERE