Filson wool bibs have kept outdoorsmen warm in freezing conditions for three decades. The thick 24-oz. wool is made from only the longest, strongest fleece fibers, with no synthetics blended in. Tightly spun yarns are woven into a dense twill that resists water and wear, while remaining highly breathable. Our Mackinaw Wool can absorb up to 30% of its weight in water without feeling damp or clammy, and will maintain its insulating power even when wet.

For high-exertion action in frigid weather, there is no better layer. One Filson employee uses Mackinaw Wool Bibs extensively for backcountry snowshoeing and cross-country skiing. Another uses them for late-season high-altitude elk hunting. The versatility of Mackinaw Wool for cold-weather field use is simply unmatched.

The cut is relaxed through the seat and thighs for unrestricted ease of motion. The sides are gusseted with metal wreath buttons for easy on/off. Flapped cargo pockets on each leg keep small essentials handy. The chest features a flapped cargo pocket and slotted pocket. Elastic suspenders flex for comfort and are secured with leather tabs and metal wreath buttons. Unhemmed.