A great extra layer, Carhartt's Duck Vest is made of cotton duck and insulated for warmth. 12-ounce, firm hand, 100% ring spun cotton duck canvas. Water-repellent and wind-resistant. Nylon lining quilted to arctic-weight polyester insulation. Brass center-front zipper with interior storm flap. Interior pocket with hook and loop closure. Two large insulated lower-front pockets. Locker loop. Drop tail hem. Carhartt-strong, triple-stitched main seams. Relaxed fit.