nomex underwear

from The Free On-line Dictionary of Computing (8 July 2008)

NOMEX underwear

   /noh'meks uhn'-der-weir/ [{Usenet}] Synonym {asbestos
   longjohns}, used mostly in auto-related {mailing lists} and
   newsgroups.  NOMEX underwear is an actual product available on
   the racing equipment market, used as a fire resistance measure
   and required in some racing series.

   [{Jargon File}]