1. 3M Company
2. Ahlstrom-Munksjo
3. American Fabric Filter Co.
4. Autotech Nonwovens Pvt. Ltd.
5. Berry Global Inc.
6. Donaldson Company Inc.
7. Ecolab Inc.
8. EHEIM GmbH & Co. KG
9. ErtelAlsop
10. Fibertex Nonwovens A/S
11. Freudenberg Filtration Technologies GmbH & Co. KG
12. Hollingsworth & Vose Company
13. Johns Manville
14. K.J. Filtration Technologies Ltd.
15. Kimberly-Clark Worldwide Inc.
16. Kraissl Company Inc.
17. Lenntech B.V.
18. Lydall Inc.
19. Rolf C. Hagen INC.
20. Sandler AG
21. Schweitzer-Mauduit International Inc.