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. 2022 Feb 2;17(2):e0262830. doi: 10.1371/journal.pone.0262830

Fig 3. Fit hacks applied to surgical masks.

Fig 3

Gray portions of the bars indicate the performance without the application of a fit hack. Green portions of the bars indicate improvement gained with the application of a fit hack. The red portion of the bar indicates a decrease in performance from applying the fit hack.