Traditional cup-shaped disposable respirator 3M™ Cool Flow™ Valve: The Cool Flow valve reduces heat build-up inside the respirator - even in hot and humid conditions Colour-coded headbands offer easy protection level identification - colour coded blue: FFP2 (APF = 10) 3M™ Cool Flow™ Valve reduces heat and moisture build-up to offer workers comfortable protection - even in hot and humid conditions Maximum usage level: Up to 12 x TLV