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(a) Fiberglass (straight) in FG-3 inner sock material with synthetic fibers (wavy) (100× PLM). (b) Rare fiberglass fragment in FG-3 bottom, outer cover material (100× PLM). (c) Fiberglass in FG-4 inner sock (80× stereozoom). (d) Fiberglass shed onto foil surface after FG-4 inspection (10× stereozoom). (e) Fiberglass in FG-4 inner cover material with synthetic fibers (100× PLM). (f) Higher magnification of fiberglass morphology from FG-4 inner sock (400× PLM).
