Shop Men's at RalphLauren.com, the Official Site of Ralph Lauren. Flag Half-Zip Sweater - This patriotic sweater is crafted in the USA from hardy cotton and features a rack-stitched mockneck and a flag detail. Mockneck. Half-zip placket. Long sleeves with ribbed armbands. Knit flag with embroidered stars at the center front. Ribbed hem. 100% cotton. Machine washable. Made in USA.