Smith Optics Embark Matte Tortoise + ChromaPop Polarized Green Mirror LensesDescription Glacier travel. High elevation summits. Spring snowfields. Eye protection in the alpine is serious business. Whether you're skiing or mountaineering, the Smith Embark glacier glasses hold up to harsh, ever changing conditions while providing a contrast boosting view of every crevasse, wind drift and terrain feature. ChromaPop delivers color and contrast boosting performance throughout the full range of the lens, so you always have the best