I'm not sure yet, but I'm thinking I could repurpose it into thread. It's durable enough that it'd be suitable to patch clothing or the like.

[Is it fireproof too? Byleth couldn't help but ponder that briefly, eyeing the locks of hair in his palm. He couldn't recall ever burning his hair, but uh, obviously he was very conscious of never setting his hair on fire, accidentally or not. He knew his skin could burn...]