Each pair of Costa Del Mar sunglasses features 100% protection from UV A, B, and C rays, 100% polarization, water-repellent coating, and anti-reflective coating. Non-mirrored lenses are constructed from lightweight, durable CR39? optical material. Manufacturer's lifetime warranty. How to choose your Costa Del Mar lenses: Heighten your visual acuity with a lens color that matches your outside conditions! Amber Excellent all-around lens. Use for sight fishing, driving and everyday activities. Vermillion This is your lens for overcast or low-light days. Perfect for inshore fishing, skiing and extreme sports.