Pack of 5 Reusable KN95 Masks with FilterProduct Highlights: Made of high quality material, durable and practical to use. Non woven fabrics, high efficiency electrostatic filter cotton. Usage: Home care, hospital, Clinic, outdoors,etc. Filter: Healthy breathing , active carbon filters isolate97% of dust, exhaust, virus, germ, dust, pollen, chemicals, fumes etc. Smooth breathing: unique ventilation design, excellent permeability, air resistance is smaller , smooth breathing. Style: Tie on or