Bulwarkâ€™s Excel-FRâ„¢ 14-oz. Denim Jacket offers an arc rating of ATPV 16.0 calories/cm2 while providing the comfort of 100% cotton. The flame-resistant jacket features a heavy duty NOMEXÂ® taped brass zipper, fully covered with a two-layer storm flap and concealed snap closure. The jacket also includes two large chest pockets and reinforced double elbows. Bulwark Protective Apparel, Nashville, TN.