Get some sturdy eyewear for your precious peepers. The Magpul Explorer has a casual design that incorporates high-performance features for those times when you want both protection and style in your life.
Polarized lenses reduce reflected light, ie. glare. When you have a lot of reflective surfaces around you, like water, wet road etc and sunny conditions, you see better with these.
Polarized lenses are a popular choice for driving, high-speed sports and fishing - the latter because you see through the water surface and not so much the glare on the surface. We only go fishing in the dark with stolen reels and rods and always drunk, so we wouldn't know what kind of sunglasses you need for that.