Cascade Home Decor, manufactures flexible woven wire fabric for the hearth market. It is a permanent material that’s lightweight and easy-to-install. The fabric is flameproof, has a low life cycle cost and is ideal for safety applications due to its superior strength and energy absorption qualities. It is also low maintenance: the metal tone finishes will not fade or darken and the material tends to shed dust. It stays clean with an occasional brushing or vacuuming.
I have been using this for a while now, like a few years... generally pretty happy. It makes the creosote come off in chunks when the chimney is swept.