Fiberglass is a lightweight, strong material made from glass fibers that are woven together and held in place with a resin. It is used in a variety of applications, from boat hulls to insulation. The history of fiberglass dates back to the 1930s, when it was first developed as a substitute for asbestos. Today, fiberglass is manufactured by melting glass and then spinning it into fibers. The fibers are then woven together and held in place with a resin. The resulting material is lightweight, strong, and resistant to corrosion and fire. Fiberglass is an important material in many industries, and its use continues to grow.