Nomex fiber (also known as Meta-aramid or Connexes) is an intermediate aromatic polyamide composite fiber that can withstand temperatures below 200 C under dry conditions. If you have water and chemicals that hydrolyze. MATAMEX Metas is a Polycondensation polymer like polyester that hydrolyzes. MATAMEX Metas is a filter material used in high temperature applications where polyester is brittle and fails. MATAMEX Meitas has excellent flexural and wear resistance, which is better than most synthetic. Nomex fibers, which are non-thermoplastic and cannot be polished. However, special techniques can be used to burn wool or other post-treatment.