Store all my material's very carefully,But I still keep a few loose...feathers,such as pheasant tail,turkey tail and the such that I use often in a glass on my desk..never had a prob.But anything attached to a skin or hide is in airtight storage container's it's usually the fats and such in say a neck for example that an insect will be looking tofeed on...not the feather fibers.and it looks nice too..