The Maui Jim Guardrail Sunglasses are made with PolarizedPlus 2 Technology which block glare and UV from all angles, manage blue light, and boost color, clarity and contrast. Proprietary MauiGradient Lenses allow an appropriate amount of light to be filtered through certain areas while less in places where protection is paramount. Along with Maui Evolution lenses fuse the best qualities of glass and polycarbonate lenses. Offering superior optics, scratch resistance, and impact resistance in a lightweight high-index package, Maui Evolution enhances color with a patented lens treatment.