For civilian use only. We are not recommending these for Medical use - they are fine for office use. Filters 95% of particles/BFE. 4-PLY, Combined 140 GSM, including 2 layers of high density melt blown polypropylene, Equivalent to N95 US and and FFP2 EU specs packaged 5 per pack minimum order is 4 packs. We have these in stock.