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 Wind Fighter ® technology tames wind 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 Relaxed fit