Revant Replacement Lenses for Costa Blackfin Polarized 1 pair lenses - Precision-cut and guaranteed to fit your Costa Blackfin frame Polarized lenses reduce glare, enhance contrast, and provide 100% UV protection Impact resistant (exceeds ANSI Z80.3 and EN 1836:2005 standards) 365-day manufacturing warranty and 60-day money-back guarantee Stress-free video installation guides available You can return this item for any reason and get a full refund: no shipping charges. The item must be returned in new and unused condition. Go to Your Orders to start the return Print the return shipping label Ship it! 100% UV Protection LockFit Technology High Impact Resistance (meets ANSI Z87.1 high mass, high velocity impact standards) Advanced Protective Coatings Taper Corrected Injection Molded High Definition Clarity Specialized Lens Tints Available in Polarized and Non-Polarized 100% UV Protection LockFit Technology Standard Impact Resistance (meets ANSI Z80.3, ISO 12312-1:2013, &amp; AS/NZS 1067:2003 standards) Anti-scratch Protective Coating 100% UV Protection LockFit Technology Standard Impact Resistance(meets ANSI Z80.3, ISO 12312-1:2013, &amp; AS/NZS 1067:2003 standards) Anti-scratch Protective Coating