Product Introduction Niosh N99 Mask is designed for people's health. It is used to prevent the air from filtering out the visible or invisible substances that are harmful to the human body, so as not to bring bad effects to the human body. The mask is breathable and durable, will effectively prevent microbial airborne diseases such as influenza tuberculosis! Advantages As a professional manufacturer, we have many years of experience in producing mask. Our factory is well-equipped. Each Niosh N99 Mask is made under strict quality control with the advanced technology. We can supply you with this product in a large quantity at wholesale price. And if you buy our products, we will give you the best after-sales service!Niosh Mask factory website:http://www.soyonintls.com/n95-mask/niosh-mask/