When people over 60 or with health issues can't physically distance, they should wear three-layer masks
Inner layer
Non-woven cotton forms final absorbent layer next to the face
Outer layer
Water-resistant synthetic material such as polypropylene limits droplets reaching nose and mouth
Middle layer
Material like polypropylene, which scores highly for filtration and reathability
Source: WHO
When people over 60 or with health issues can't physically distance, they should wear three-layer masks
Outer layer
Synthetic water-resistant material such as polypropylene limits droplets reaching nose and mouth
Middle layer
Material like polypropylene, which scores highly for filtration and breathability
Inner layer
Non-woven cotton forms final absorbent layer next to the face
Source: WHO