KN95 masks can prevent bacteria, viruses, dust and other shielding effects up to 95%. Totally five layers: From the outside to the inside are two layers of non-woven fabric, melt-blown fabric, hot air cotton, skin-friendly non-woven fabric. It's very comfortable to wear and won't feel stuffy.
The normal disposable mask , totally three layers:From the outside to the inside are non-woven fabric , melt-blown fabric and skin-friendly non-woven fabric. It's even more comfortable than KN95 mask, and the filtration efficeency of bacteria also can be over 95%.