Comfort and exertion while using filtering facepiece respirators with exhalation valve and an active venting system among male military personnel

摘要

INTRODUCTIONThis study aimed to determine if disposable filtering facepiece respirators (FFRs) that come with an exhalation valve (EV) and a novel active venting system (AVS) provided greater perceived comfort and exertion when compared to standard N95 FFRs without these features among male military personnel performing prolonged essential outdoor duties.