the.com/fiberglass

means A material made of fine woven glass fibers, often set in resin, prized for being strong, lightweight, and resistant to rot and rust.

from A straightforward compound of 'fiber' (from Latin 'fibra,' meaning a thread or filament) and 'glass' (Old English 'glæs'). The material itself emerged in the 20th century when manufacturers discovered that molten glass, drawn into hair-thin strands, loses its brittleness and gains surprising tensile strength — the name simply describes exactly what it is, no myth required.