Timeless, classic and confident, The Revo windspeed sunglasses boast streamlined design with a slick aerodynamic appearance. Whether measured in knots or nautical miles, these sunglasses fit perfectly for days that start or end on the water. The Revo surface pro protection system includes Revo exclusive mirror coatings, Revo back-surface protection coating, authentic Revo hydrophobic coating, and authentic Revo oleophobic coating. The Revo exclusive mirror coatings has 3-6 layers of high-tech, performance mirror coatings based on nasa lens technology used for satellite protection and Revo back-surface protection coating. The authentic Revo hydrophobic coating is a permanent coating on the back of the lens that repels water and sweat while the authentic Revo oleophobic coating is a permanent coating on the front of the lens that repels oil and fingerprints.