Scomfort, slowness in movement and muscle ache or pain. The participants rated on the range of selfperceived dangerous PSI values (Can you state the level of PSI (0?00) which you find dangerous to your health?), personal possession and perceived usefulness of the N-95 mask on 5-point Likert scales. The Impact of Event Scale- Revised (IES-R) is a 22-item selfadministered questionnaire that has been