Table 2.

Usability testing questionnaire

Q1. I feel comfortable while using this mask

Q2. Using the mask, I do not have any concern of contaminated air entering in

Q3. Mask is fitted well on the face, nose, chin, and jaw

Q4. The air does not pass the mask edges while inhaling and exhaling

Q5. While speaking I am sure the mask is on the right position

Q6. Rotating left and right, I am sure the mask is fitted properly

Q7. Moving head up and down, I am sure the mask is fitted properly

Q8. While wearing mask, I feel safe against virus penetration