The Clearline KN95 masks filters out over 95% of pollutants and molecules including: viruses, dust, allergens, pollen, chemicals, and smoke. These masks are safe for everyday use by everyone in your family. In addition, the KN95 is designed to be worn for long periods of time. Unlike its counterpart the N95, the Clearline KN95 is effective and can be worn all day without leaving nasty, painful marks on your face. Wear this mask without worry.