Nautical Eyewear. Round frame shape with small to medium fit. All of our shades feature 100% UV, polarized, Nylon Optic lenses which are clearer than glass and coated with a scratch resistant, hydrophobic armor. Our frames are featherlight for ultimate comfort and floating ability for life out on the water. All Rheos shades come with a lifetime frame warranty and our Saltwater Promise 1-year lens warranty so you can adventure without worry.