A men's sheepskin jacket is the quintessential piece of rugged yet luxurious outerwear, celebrated for its unparalleled warmth, durability, and enduring style. Often referred to as a shearling jacket (a sheepskin with the wool still attached, providing the plush lining), this garment has a rich history, moving from the functional necessity of World War II aviators and cold-weather workers to a timeless, fashion-forward statement. Its construction inherently offers superior insulation: the naturally tough leather or suede exterior serves as a wind-resistant shield, while the dense, soft wool fleece interior effectively traps body heat, making it an ideal choice for moderate to frigid temperatures.