Fabrics are woven, flexible materials commonly used in the textile and packaging industries. Burlap fabric is a coarse, natural fiber that resists stretching and tearing and provides breathability. PTFE-coated fiberglass fabric consists of spun-glass fibers woven into a pliable, cloth-like material that's light and durable. Silicone-coated fiberglass fabric resists oil, water, flames, tears, and punctures. It is often used for welding curtains, heat shields, and insulation.