These masks are intended to be used for protection against solids, such as those from minerals,coal,iron ore,flour and certain other substances.They are extremely durable with a soft and comfortable inner surface,also have an adjustable nose piece and secured head straps to provide proper fit.These masks have a 510(K) number for the medical market and approved by NIOSH.
NIOSH Approval: TC-84A-5411 FDA 510 （K）：K020474
CDC Link: https://www.cdc.gov/niosh/npptl/topics/respirators/disp_part/n95list1sect2m.html
Product Info Link: http://www.makrite.com/products/?&SingleProduct=2942
Note: 20 units per case, 400 per carton