As much a jacket as it is a heavy shirt, this updated Mackinaw Wool Jac-Shirt is warm, weather-resistant, and highly breathable. Built with the same wool that’s sheltered foresters and sportsmen from wet and cold weather for over a century, our heaviest jac-shirt is built to stand up to the elements for years on end. Only the longest and strongest fleece fibers are selected for our Mackinaw Wool, which are then spun into dense yarns and woven in an uncommonly-tight weave that turns away the weather and lasts for decades. For even more warmth, it’s lined with our signature Alaskan Guide Flannel that’s been a favorite of bush pilots, sportsmen and tradesmen for decades. The flannel-lined, angled-entry hand pockets warm your hands so you can maintain the dexterity to handle binoculars, shells or tools. The snaps on the front closure, chest-pocket flaps and adjustable cuffs are absolutely reliable and easy to operate even with gloves on. The left-chest pocket features a slotted utility pocket, perfect for stowing pens or small tools. The sleeves are lined in polyester twill for ease of layering. Built with 26-oz. 100% virgin Mackinaw Wool Lined with Alaskan Guide flannel in the torso Lined with polyester twill in the sleeves Front closure and adjustable cuffs secure with snaps Angled-entry flannel-lined hand pockets Snap-flap chest pockets; left side with additional slotted utility pocket