Frequently Asked Questions

How to use a mask properly issued by Department of Public Health City of Philadelphia

Best practice to use mask.

  • Before putting on a mask, clean hands with alcohol-based hand rub or soap and water.
  • Cover mouth and nose with mask and make sure there are no gaps between your face and the mask.
  • Avoid touching the mask while using it; if you do, clean your hands with alcohol-based hand rub or soap and water.
  • Replace the mask with a new one as soon as it is damp and do not re-use single-use masks.
  • To remove the mask: remove it from behind (do not touch the front of mask); discard immediately in a closed bin; clean hands with alcohol-based hand rub or soap and water.

Differences of Masks

Surgical 3 ply mask non medical with FDA registration and CE certification

Surgical Mask

N95 KN95 Respirator

N95 KN95 Respirator

  • 3 Layers of Thick Material - The masks are made of 3 layers of high-quality non-woven fabric, moisture-proof with a strong filtering that’s soft and comfortable.

Cons:  looser fitting



KN95 Mask FDA CDC Appendix A EUA Certifications

N95 KN95 Respirator

N95 KN95 Respirator

N95 KN95 Respirator

  • Adopting FFP2 grade anti-particulate matter filtering technology and antibacterial environmental protection fabric
  • Filter 95% airborne particles
  • Effectively filtering and protecting from PM2.5 air particulate matter and bacteria  

Pros: better fitting



N100 mask NIOSH N95

P100 & N100

N95 KN95 Respirator

P100 & N100

  • Protection from debris and materials that are larger than 0.3 microns 
  • Filter 99.7% airborne particles. 
  • "N" designation = not resistant to oil. 
  • "P" indicates P95 respirators = oil proof.