Heidi's Herbal Moth Tamer does not kill moths, rather it repels them. The aroma is mild to humans, but is highly unpleasant to moths and they will leave to lay their eggs elsewhere. Remember that it is the larvae that devastate the woolens. Just place the bags in between your woolen articles, or hang the bags in your closets. Contents 4 herb-filled bags approximately 4" x 5". Made locally in New Hampshire.