A Puraka Mask is not intended as a replacement for an N95 respirator, and there’s a very good reason for this. N95 masks fit tightly against your face, forming an air-tight seal between your mouth & nose and the outside world. This provides a high degree of protection, but this also makes it significantly harder to breathe. For a medical professional who is frequently exposed to airborne virions, the extra protection might be worth the increased strain on her heart caused by the N95 respirator. For the rest of us, wearing an N95 mask during everyday activities is probably going to cause more harm than good.