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Removable side shields 580 LightWAVE glass lenses 100% polarization 100% UV protection Water-repellent and anti-reflective coatingsManufacturer's lifetime warranty Just the right size for big faces and even bigger adventures, Costa's Man-O-War 580 Polarized Sunglasses feature removable side shields for maximum protection against glare, dust, sand and spray. The Man-O-Wars are designed with Costa's 580 LightWAVE glass lenses which in addition to providing 100% polarization and 100% UV protection, they also incorporate an advanced filtering compound into the lens material to reduce yellow light. This results in enhanced colors and greater visual acuity in all conditions. LightWAVE glass lenses are 20% thinner and 22% lighter than typical glass lenses but they still exceed federal standards for impact-resistance. The optically correct 580 lenses also feature both a water-repellent coating and an anti-reflective coating. Costa sunglasses include a manufacturer's lifetime warranty and protective sunglass case. Frame fit: L-XL. How to choose your Costa lenses: Heighten your visual acuity with a lens color that matches your outside conditions! Blue Mirror A gray based lens made for the open water. Delivers maximum contrast and color in full sun while eliminating glare. Green Mirror This amber based lens has an encapsulated mirror for bright sun conditions for fishing inshore, flats, rivers and streams. Silver Mirror A copper based encapsulated mirror lens to optimize light transmission and enhance colors. Perfect for freshwater sight fishing or any outdoor activity with variable light.