nonwashable

from WordNet (r) 3.0 (2006)

nonwashable
    adj 1: not washable [ant: {washable}]

from The Collaborative International Dictionary of English v.0.48

nonwashable \nonwashable\ adj.
   not washable; damaged by washing; -- used mostly of clothing,
   especially clothing that must be cleaned by a dry-cleaning
   process. Opposite of {washable}.
   [WordNet 1.5]