From Oakley, these Men's Holbrook Polarized 59mm Square Sunglasses feature:  Square shape Durability and all-day comfort of lightweight O Matter™ frame material Three-Point Fit: Comfort and performance that holds lenses in precise optical alignment Prizm™ lenses enhance color, contrast, and detail for an optimized experience HDPolarized: Minimizes glare via technology that produces a comprehensive, single-layered lens (optional) Plutonite® lens material offers top UV Protection filtering 100% of all UVA, UVB up to 400nm, and some harmful blue light Rx able Imported.