Our Lined Mackinaw Wool Work Vest combines our iconic durable and weather-resistant wool with high-pile Sherpa that mimics the heat-trapping ability of sheep’s fleece. You simply won’t find a warmer, more-versatile vest. The Lined Mackinaw Wool Work Vest is built with our warmest wool, the same that’s provided protection from cold and wet conditions for over a century. Because our Mackinaw Wool is made with only the longest and strongest fibers, naturally it’s the ideal wool to shield humans from soggy or frigid weather. With an uncommonly-tight weave, it’s a formidable barrier to wind, and withstands tough use for decades. Due to wool’s complex fiber structure, it also offers an unheralded benefit–it’s very simple to care for. Dried dirt brushes off with ease, leaving virtually no trace of its existence.