Fiberglass is light but strong, built from fine glass threads. It is read as hidden strength, and as something durable that can still irritate when handled carelessly.
When this appeared in your dream, what were you feeling?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.