I work in a wildlife museum, which is basically two floors of fur coats. Protocol for destroying destructive insects begins with two weeks in a deep freeze, a thawing out period, then two more weeks in the deep freeze.
After losing several very nice wool garments to moths over the years, I bought a small chest-style deep freeze in which to store my wool garments over summer. Serves double duty: hunting season begins just before wool eating moth season ends, so I can take my winter wear out of the freezer and use it for supplemental meat storage during the winter.