... sides due to tension and forces.KEDER is made of a specialty PVC tube with woven polyester single side PVC ... colors, weaving densities) due to the large variety of specifications and application requirements.Item :a) Single Flap (Weld)b) Double FlapFabric : ... designed specially for use in tents, fabric structures, truck side signs, industrial curtains, banners, awnings, pool cover, and various marine ...