Our archival grade preservation bags are made either from Tyvek(r), non-woven polypropylene, or muslin.  They come as hanging garment bags, or as flat lying bags so that you may store your items in the most convenient manner.
Tyvek® is an archival, acid-free, high-density polyethylene fiber material.  It is used in museums to protect precious objects.
100% cotton muslin is non-acidic, stable and provides a buffer against light, humidity and contaminants. Museums use muslin for textile conservation and preservation because it provides a stable and non-acidic environment.
Non-Woven PP is lightweight but very strong and will resist punctures and tears from sharp edges. Reusable and recyclable it is a safe and green alternative for storing your clothing.