You might also look into using pipe insulation from the hardware store. It is maybe a higher grade of poly.. Here is an example. http://www.doitbest.com/Pipe+insulation-I+T+P+Ltd-model-PR38138UA-doitbest-sku-400211.dib We have been using the narrower diameter to line clothes hangers and the wider diameter to roll clothing. It is fairly cheap and seems inert. We learned about it from another museum that uses it. It is also available year round.
