I-EN 149 ngumgangatho waseYurophu wovavanyo kunye neemfuno zokumakisha zokucoca imaski enesiqingatha.Ezo maski zigquma impumlo, umlomo kunye nesilevu kwaye zinokuphefumla kunye/okanye neevalvu zokuphefumla.I-EN 149 ichaza iiklasi ezintathu zeemaski zesiqingatha sesuntswana, ezibizwa ngokuba yi-FFP1, i-FFP2 kunye ne-FFP3, (apho i-FFP imele isihluzo sobuso) ngokwendlela yokucoca.Ikwahlela iimaski zibe 'kusetyenziso lweshifti enye kuphela' (ayinakuphinda isetyenziswe, iphawulwe i-NR) okanye 'inokusetyenziswa kwakhona (iishifti engaphezulu kwesinye)' (ephawulwe R), kunye nonobumba owongezelelweyo wokuphawula ongu-D ubonisa ukuba isigqubuthelo sobuso sidlulile. uvavanyo olukhethiweyo lokuvala usebenzisa uthuli lwedolomite.Ezo ziphefumli zokucoca ezisebenza ngoomatshini zikhusela ekuphefumlweni kwamalungu anje ngamasuntswana othuli, amathontsi, kunye ne-aerosols.
