Buyers should prioritize Fiberglass, Polyester, or Polyethylene (PE) depending on the application. Fiberglass with PVC coating is the industry standard for window screens due to its flame retardancy and dimensional stability. For agricultural or long-term outdoor use, ensure the material includes UV stabilizers to prevent brittleness. Pay close attention to the mesh density (e.g., 18x16 or 20x20 strands per inch); a higher density prevents smaller insects like midges but may reduce airflow and visibility.