Question

Do you mean a face mask?

I have heard that music soothes the wild beasties!   :)

A three turn dance after adding warm liquids might also help.  

If your looking for industry or OSHA specs you can try this site,

http://www.globalspec.com/SpecSearch/SearchForm/manufacturing_process_equipment/personal_protective_equipment/respirators

I would think any home use mask rated for dust or small particles would work. 

I've seen cloth washable ones too.  Also sold where motorcycle helmets can be found... hardware.... online

Also under:  Particulate Respirator