It has been scientifically proven that the majority of respiratory problems have to do with the poor quality of the air that surrounds us and that we breathe. Many of the external agents work as plagues for our lungs, the first victims being children, the elderly and people with respiratory problems. So Alvi comes to solve this big problem we have at home! No more polluted or harmful air. Alvi is the friend of our lungs. The fact that he adsorbs impurities from the environment seems great to me. Maybe you have no escape from the polluted air in the street, but there is no excuse for not having clean and healthy air at home. Alvi is the best!