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What Our Gearhead(R) Experts Are Saying:"The Jac-Shirt is my favorite for chilly mornings and evenings at camp. The tightly-woven 18oz wool keeps me warm without adding bulk, and it's surprisingly breathable, even if I'm moving around. It's perfect as a standalone jacket or a midlayer under a shell."We appreciate how the Jac-Shirt blurs the line between overshirt and lightweight jacket, offering versatility for life outdoors. Made with tightly-woven 18oz Seattle Wool, this midweight layer provides low-bulk warmth that keeps us comfortable, even when the weather turns damp. Perfect for brisk mornings at the trailhead or evenings by the campfire, the breathable wool construction regulates our temperature without sacrificing durability. Button-adjustable cuffs and a snap-closure front give this piece a clean, classic look that's equally at home on the trail or in town. Snag-free hidden buttons on the chest pockets add a touch of practicality to this timeless design.