Rather than synthetics, Filson trusts two natural performance fabrics for its Filson Mackinaw Wool Hunting Jacket. It's crafted from 100% virgin Mackinaw Wool, tightly woven to protect against wind, snow, and rain while allowing moisture to escape to keep you dry and comfortable. It naturally wicks away water and holds up to 30% of its weight in moisture without feeling wet. Ideal for hunting, the material sheds odors and remains silent when on the move. The jacket's shoulders, sleeves, and hood are cut from waxed cotton for enhanced water resistance. It offers ample storage for daily essentials, including a pair of expandable cargo pockets on the front and a rear game pocket lined with coated nylon.