When you buy through our links, Business Insider may earn an affiliate commission. Learn moreBlack Friday is one of the best times to get a major discount on a quality winter coat.Backcountry/Business InsiderBlack Friday is a savvy time to shop expensive wardrobe essentials, such as a hearty winter coat. Some of the season's top brands, including Woolrich and Cotopaxi, are offering Black Friday deals up to 40% — their steepest markdowns of the year.