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Young children often have symptoms of nasal congestion due to cold and rhinitis and need to wear a mask for protection. Children with nasal congestion will have a more unventilated nose after wearing a mask. As a result, young children are generally reluctant to wear masks. This mask incorporates a component that congestion in the exhaust breathing valve. Make breathing smoother and children fall in love with wearing masks.
Chongqing University
Chongqing, China
Zhou Yue,
Chongqing University