Tri-Mer Tri-flow filters offer filtration efficiencies of 99.999 percent on .5-micron and larger particles by weight. Media options are customized by application and include polyester felt hydrophobic/oleophobic; polyester felt antistatic; high-temp antistatic; polyester felt microporous; and polyester nonwoven with a microfiber surface, PTFE membrane or PTFE membrane/antistatic.