We have three kind of HY9610 mask:
    * Conforms to EN149:2001+A1:2009.
* Economical fold flat design and easy carry/storage.
* Individually hygienically packed. * Latex-free & continuous loop head straps, adjustable nose clip and soft inner nose foam. * Colour coded for ease of identification. * Exhalation valve reduces hot air buildup and easy breath in hot/humid environments. * Activated charcoal offers relief from nuisance organic vapors (below WEL) * Maintenance free.