Loose Fit Firm Duck Quilted Flannel Lined Active Jac J140 Carhartt Men's Loose Fit Firm Duck Insulated Flannel Lined Active Jac Amazon.com: Carhartt Men's Loose Fit Firm Duck Insulated Flannel Lined Carhartt Men's Full Swing Loose Fit Washed Duck Fleece Lined Active Carhartt Men's J140 Loose Fit Firm Duck Flannel Lined Insulated Active. Warmth Rating Earned: Level 3 Warmest Engineered For High Warmth in Severely Cold Conditions. See Technology section below for more details. Rancher or lineman, anyone who works outside can appreciate the cold weather chops of this men's hooded jacket. Proudly , it's crafted with rugged cotton duck, and the body and hood are lined with quilted flannel for under the covers warmth.