If you sometimes struggle with map reading, fret not: these have built-in magnification, so you can see what you're doing without having to switch out your shades. Adjustable temple and nose pieces give a custom, non-slip fit every time.  Allows for airflow to prevent fogging.  Black Gloss frame, Polarized Gray/Blue Flash lenses. Only one pair of lenses is included (two eyeballs worth) 2-year warranty.  Hard case included that also carries spare lenses.  Microfiber lens cloth included.  Available in Polarized with AR Coating and mirrored lenses. Optical quality hinges for durability.  Interchangeable lenses manage any light condition with ease.  Durable polycarbonate lenses offer 100% UV protection.  The Grilamid Frame is lightweight, strong, and flexible.