Benefits 

• They are able to expel exterior pathogens (Evil Qi) such as Wind, Cold, Dampness, Summer Heat.
• The Chinese wearing it for prevention of seasonal flu, common cold and child indigestion and so on.
• The aromatic odor emitted by the herbs can stimulate human nasal mucosa to increase the secretion of antibody- immunoglobulin A(IgA) on the nasal mucosa which can kill virus and thus reducing the chance of catching a cold or a flu.