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 can be used TB situations as recommended by OSHA.The site is slightly smaller than respirators in N95 series.

NIOSH Approval: TC-84A-5463 FDA 510 (K): k020474