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30pcs 3 layers disposable mask anti pollution mask black adult unisex protection fabric dust mouth mask for allergy asthma mask name:disposable face mask sterile:yes packing: 30pcs lot product feature: 2. plasticity nose bridge strip, hide the sides of the fixed nose.more suitable for all face types. 4.inner layer:skin-friendly non-woven .soft and comfortable reduce the probability of skin allergies. 5.strong and durable.fine workmanship.