Kneipp Classic Thermal Spring Bath Salts gently exfoliate, tone, and increase elasticity. Brine from thermal-spring saltwater far below the earth surface is processed into crystals and then blended with pure plant essential oils. Activated by hot water, these enriched salt crystals help build resistance to daily aggressions. The aroma-intensive, essential eucalyptus oil stimulates and helps clear the senses especially during cold and flu season.