TABLE II. Commonly Used Respiratory Protective Devices with or without an Overlying Medical Mask.

Type	Model	Exhalation Style	Surgical Mask Valve Model	Overlying	Mfr.	Filter	Cartridge
Control (no respiratory protective equipment)	N/A	N/A	N/A	N/A	N/A	N/A	N/A
Half-mask filtering facepiece	Cup-shaped	No	No	3M	1860	N95	N/A
Medical mask	Loose-fitting	No	N/A	Precept	15320	N/A	N/A
Half-mask filtering facepiece	Duckbill	No	No	Kimberly Clark	PFR95170	N95	N/A
Half-mask filtering facepiece	Cup-shaped	No	Yes	3M; Precept	1860; 15320	N95	N/A
Half-mask filtering facepiece	Cup-shaped	Yes	No	3M	8511	N95	N/A
Powered air-purifying	Hooded	No	No	3M	Air-Mate	HEPF	451–02-01
Half-mask filtering facepiece	Cup-shaped	Yes	Yes	3M; Precept	8511; 15320	N95	N/A
Half-mask elastomeric	Half-face	Yes	No	North	5500	P100	7580P100

Notes: All respirators certified by NIOSH.

N95 – Filters at least 95% of airborne particles. Not resistant to oil.

P100 – Filters at least 99.97% of airborne particles. Strongly resistant to oil.

HEPF – High-efficiency particulate filter.

Surgical mask – Precept Medical Products, Arden, North Carolina.

North 5500 – North Safety Products, Cranston, Rhode Island.

Duckbill filtering facepiece respirator- Kimberly-Clark Corporation, Irving, Texas.

Cup-shaped filtering facepiece respirator- 3M Corporation, St. Paul, Minnesota.