MACKINAW WOOL VESTOur Mackinaw Wool Vest, universally trusted by ranchers, loggers and all manner of sportsmen, has proven itself to be as versatile, functional and practical as any product weve ever manufactured. This vest's all conditions performance has made it cornerstone in the Filson product line for more than fifty years. This classic wool vest provides warmth with excellent breathability, even when wet. Worn over a warm shirt while active, its the perfect blend