The Mackinaw Wool Jac-Shirt insulates like a coat and wears like a shirt. It’s made from the wool that has provided protection from cold, rainy weather for over a century. The flapped front pockets keep essentials close at hand and feature hidden buttons that won’t snag on equipment or gear. Buttoning front closure and adjustable cuffs. Our 100% virgin wool wicks moisture away for evaporation and can absorb up to 30% of its own weight in water without feeling damp or clammy. This moisture management has made wool the fabric of choice in the outdoors for centuries. Mackinaw Wool’s uncommonly tight weave provides outstanding weather resistance and the durability to last generations.