I have a friend in the Patriot Guards (welcome home group for soldiers). Their vehicles are motorcycles. So on the back of the bike, he has 3 flags (nylon) that he wants to know if I can do something to them to stop or hold off the shredding that happens during driving. Most of the flags are folded over like a hem. I can't fold over anymore because of the grommets at the one end. Do you think zig zagging would help? Some are heavy nylon, some are thin. Googled and didn't get any information. Hope I can get some help on this! Thanks!