fibreglass

Fiberglass is a trasparent material made up of fiber which can be used instead of glass and looks like glass but then are unbreakable then the glass.

Fiberglass or fibreglass is material made from extremely fine fibers of glass. It is used as a reinforcing agent for many polymer products; the resulting composite material, properly known as fiber-reinforced polymers (FRP), is called "fiberglass" in popular usage. Read more here: http://encyclopedia.thefreedictionary.com/fibreglass