Once upon a time, flannel workwear reigned supreme. But these days, good flannels are hard to come by; they’re either soft and wimpy, tough and scratchy or just plain unfuzzy. So we set out to design a flannel that’s juuuust right. Our Folklore Flannel™ Shirt Insulated Shirt Jac is warmer than a dragon's lair, built with the fabled fluff fairy tales are made of – formidably thick, double-brushed, insulated with poly fill and lined with smooth, soft taffeta. Plus it’s built with all the fine, thoughtful details you’ve come to expect from Duluth – from the extra-large Shirttail Shammy® to Reach Gussets® and back waist tabs for an adjustable fit.