The effect of wearer stubble on the protection given by Filtering Facepieces Class 3 (FFP3) and Half Masks (UK’s HSE RR1052)

Ever wonder about that 5 o’clock shadow and the impact it may have on a respirator face-to-mask seal?  How about 2-3 days growth… what is that impact on respiratory protection safety?  Well now we have a much better idea!  The UK’s Health and Safety Executive (HSE) did a small study to find out just how...