Listlessness can have many causes - from lack of sleep to mild illnesses such as the flu to serious physical illnesses or mental problems such as depression. However, most people who are constantly tired and listless are physically and mentally healthy. In healthy people, the key to solving the problem often lies in sleep. With Biow, you improve the quality of sleep by enriching your air with ions that neutralize harmful particles, allowing the body to regenerate better and 9 out of 10 Biow users a restful sleep.