• Efficiency handmade masks with filter 80% to 95%
  
• Efficiency handmade masks without filter 16% to 22%
• Effectiveness of dental masks 66% to 70%
• The electrostatic cotton filter should be replaced after each use to maintain its particulate prevention ability.
• Shipping: 24h-48h with Xpresspost and tracking number

Our disposable electrostatic cotton filters are made for our 3-ply masks with an interior pocket. However, they can also be used with other masks by applying them only inside the mask. Please note that our 5 ply masks have an integrated fiber filter. 

* Source: Seoul Institute for Public Health and Environmental Research. Read the full article in English here.

NB: mask in photo not included.