Nylon is strong, light and synthetic, and is read as practical toughness. In dreams it can stand for relationships or plans that hold up despite feeling artificial.
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.