McKinley RS

Reaches a marginal glacier density of 88% (12% VLT) at full darkening. A more aggresive, higher contrast version of the basic McKinley starting at a 40% density in lower light moderate to cool temperatures and transitioning to marginal glacier density in brighter conditions. An excellent rapid sport (RS) lens, with some flexibility for other applications. CAUTION! Extreme cold will also activate darkening even in lower light conditions. Available in plastic and NXT, single vision and progressive. Some RX limitations may apply on NXT availability.