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 Rib knit collar 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 Carhartt label sewn on left pocket