SuperKnit polyester flags are made exclusively for Online Stores and are known for their incredible durability. The flags are much stronger than printed polyester and cost less than nylon, but last nearly as long. All SuperKnit flags have heavy-duty headers, brass grommets and 4 rows of stitching on the fly end to prevent frays and extend the life of the flag. OnlineStores.com is the exclusive retailer of SuperKnit polyester flags.