Great for any outdoor activity that takes you on or around water, the Optic Nerve Alloy Polarized Sunglasses blocks 99.9% of the glare that bounces off water, snow and even rock. The lenses boast an anti-reflective lens technology and a hydrophobic coating which protects against water, oil, dust and sweat for improved clean ability and durability. The Alloy Polarized are prescription ready and come in 2 frame colors - black and shiny dark gunmetal. The metal frame and components are constructed from nickel silver alloy that is coated for hypoallergenic performance.