Made of Himalayan Salt rock. Each night light works as a air purifier, deodorizer, and tranquil sleep aid. 
 
When you turn your Himalayan Salt Night Light on the bulb inside heats the salt rock slightly. This allows it to absorb moisture from the air and remove impurities. The process also increases the negative ion count in the air around it. Negative ions have been know to bring on a sense of relaxation.
 
Shape, color and size mary vary slightly due to the nature of the salt