Convenience products for workshop, hospital, food industry or daily use. Low breathing resistance and high filtration efficiency. Three layers of non-woven fabric ensure filtration and absorption of a certain amount of harmful industrial dust. Non-woven lace can easily tie and secure the mask to your face. Economic price for one-time use. Note: Store this product in a cool and dry place, avoid direct sunlight, stay away from places that children can contact, and avoid eye contact. If you have allergies to this product, please stop using and consult a doctor. What's in the box 50 Pieces/box