Mothballs are small, round balls made from chemicals like naphthalene or paradichlorobenzene. They are commonly used to protect clothing and other fabrics from damage caused by moths and other insects. When placed in storage, mothballs release a strong odor that deters pests, helping to keep items safe. While effective, mothballs should be used with caution. The chemicals can be harmful if inhaled or ingested, so it's important to keep them out of reach of children and pets. Proper ventilation is also necessary when using mothballs to minimize exposure to their fumes.