The standard requires that masks should be able to protect the mouth and nose safely and firmly, and there should be no sharp angles and edges that can be touched.
Izinga lidinga ukuthi izifihla-buso kufanele zikwazi ukuvikela umlomo nokukhala ngokuphepha nangokuqinile, futhi akumele kube khona amakhona abukhali nemiphetho engathintwa.