Maui Jim designed the Spartan Reef Sunglasses to give you crystal clear optics and provide the protection you need to run, hike, fish, boat, drive, or walk on the beach without getting a squint headache. Apart from their sleek design, these sunglasses feature ST Glass lenses that are 20% thinner and lighter than standard glass lenses, and that resist scratching for excellent longevity. These lenses feature multi layer PolarizedPlus 2 technology that eliminates glare, blocks harmful UVA and UVB rays, and really makes colors pop. The bi gradient mirrored tint also filters sunlight progressively. Maui Jim added rubber pads over the nose and temples on the durable nylon frame to fit medium to large faces comfortably, and then treated it with waterproof and oleophobic coatings to shed water and repel grease. The anti corrosive spring hinges won't rust up when you take this pair of shades out in the ocean.