Is this the type of reinforced burlap that was used by Ford to cover seat springs?
https://romeoengineering.com/shop/ols/products/17-x-22-vintage-wire-woven-burlap-for-all-vintage-american-cars (https://romeoengineering.com/shop/ols/products/17-x-22-vintage-wire-woven-burlap-for-all-vintage-american-cars)