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. 2021 Mar 2;14:869–873. doi: 10.2147/RMHP.S286404

Table 1.

Measurement of Water Equivalent Thickness (WET) for Medical Masks (in 10-Piece Pack)

Energy (MeV) Distal R90 (mm) Distal R80 (mm)
Giraffe Medical Masks Diff Giraffe Medical Masks Diff
70 37.20 36.10 1.10 37.40 36.30 1.10
110 86.90 86.00 0.90 87.40 86.40 1.00
150 152.50 151.50 1.00 153.20 152.20 1.00
190 230.90 230.00 0.90 231.80 231.00 0.80
220 298.50 297.60 0.90 299.50 298.70 0.80

Abbreviations: R90, percent dose range 90%; R80, percent dose range 80%; Diff, difference in range.