Assessing the effect of beard hair lengths on face masks used as personal protective equipment during the COVID-19 pandemic.
Steven E PrinceHao ChenHaiyan TongJon BerntsenSyed MasoodKirby L ZemanPhillip W ClappWilliam D BennettJames M SametPublished in: Journal of exposure science & environmental epidemiology (2021)
Though variable, N95 respirators offer the best respiratory protection for bearded men. While KF94 and KN95 FFE is compromised considerably by increasing beard length, they proved better options than procedure and cotton face masks. A simple exercise band improves FFE for face masks commonly used by bearded men during the COVID-19 pandemic.