The United States Flag Store is pleased to offer a full line of Super Knit products including American flags, international flags, state flags, military flags and more. Super Knit polyester flags are as durable as nylon flags, but are less expensive. Choose an American flag for your home flag pole or a military flag to give as a gift. All flags have heavy-duty headers, brass grommets and 4 rows of stitching on the fly end to prevent fraying.