Protect yourself and those around you with this Standard Protective KN95 Face Mask. It is FDA Registered. It is a perfect protective mask to be used in the workplace, grocery shopping, and any other daily application during this difficult time. And with 4 filtration layers, it keeps out 95% of airborne particles (its filter performance is equal or larger than 95%) for maximum protection. This 4-Layer mask is lightweight and comfortable for a long time daily use.