. "Fiberglass (or fibreglass) is a type of fiber reinforced plastic where the reinforcement fiber is specifically glass fiber. The glass fiber may be randomly arranged, flattened into a sheet (called a chopped strand mat), or woven into a fabric. The plastic matrix may be a thermosetting plastic \u2013 most often epoxy, polyester resin \u2013 or vinylester, or a thermoplastic.The glass fibers are made of various types of glass depending upon the fiberglass use."@en . .