A face mask 1 for filtering airborne particles, gases and/or microorganisms comprises (i) a cover 2 for positioning over the mouth and nose of a wearer, (ii) one or more filters 6a,6b for filtering airborne particles, gases and/or micro-organisms (e.g. an FFP1 filter), and (iii) one or more inlet ports 7a,7b for allowing air to enter the mask; wherein the size of the one or more inlet ports is adjustable, e.g. in cross-sectional area through insertion or removal of a removable insert 10a,10b . A kit comprising the face mask and a plurality of inserts for adjusting the cross-sectional area of the one or more ports is also provided.
Face mask
2021-02-03
Patent
Electronic Resource
English
NTRS | 1982
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