The Cedarwood Moth Repellent Set utilizes natural cedar blocks to trap and expel insects, moths, mildew, and mustiness from closets, pantries, and other storage areas. Unlike chemical-laden moth balls, this set provides an alternative safe, natural solution. The storage bag contains cedar blocks and essential oil, allowing you to add the blocks to drawers, cupboards, and woolens to ward off pests. Adding a few drops of cedar oil to the blocks periodically helps maximize their efficacy.