Whether they are naphthalene balls or para-dichlorobenzene (para-DCB), moth balls are solid balls, usually enveloped in a thin cloth, that slowly evaporate in the air until they are gone. It’s that evaporation that kills any clothes moths and their larvae, as well as any carpet beetles.But these moth balls are not natural and not safely for people,especially for kids and pets. So people perfer some natural ways to keep moth away and safe for family, there are lavender sachets and aromatic red cedar blocks for choose.