(3E22) PREMIUM DOWNDRAFT MEDIA. THIS MEDIA IS COMPOSED OF OPTIMAL PROGRESSIVE STRUCTURE AND LAYERS OF DIFFERENT FIBER DENIER ABD IS THERMO-BONDED. THIS MEDIA IS FULLY IMPREGNATED WITH ECOLOGICALLY SOUND DUST BINDER (TACKIFIER), MIGRATION PROOF, MIGRATION TEST CLASS S0 (10 MICRONS), NON-STICKY SURFACE.