Im looking for rec's on plastic or elastic strech cord. I dont want to put too much trust in amazon reviews. Id much rather ask folks here.

What brands are durable, thick and will last for long term wear?

I recently bought 5, second hand beaded crystal bracelets that are made with plastic strech cord. But its dry roting, is stiff and hardly streches anymore. I can see the cord crumbling /breaking down when streched. I want to restore these bracelets with new cord before they inevitably break and I lose my crystal beads.

Thank you for your insight and rec's