Proudly Fly this Flag! 20' x 30' U.S. Flag is made of 100% heavyweight DuPont nylon with full size sewn stars and sewn stripes. Sewn with a heavy white polyester canvas header and nylon ropes with galvanized metal thimbles for added strength on the left side. Fly end is reinforced with superior,bonded nylon thread stiching for extra durability and strength.