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Table 2 Qualitative fit testing results using mask frames

From: 3D Printed frames to enable reuse and improve the fit of N95 and KN95 respirators

Type of test: Performance of frames with respirators with broken or defective straps Performance of frames for individuals who failed baseline testing
1860 model (total n = 34)
Number Passed (%) 24/30 (80.0 %) 0/4 (0 %)
8210 model (total n = 10)
Number Passed (%) 9/9 (100 %) 0/1 (0 %)
Kimberly Clark duckbill model (total n = 16)
Number Passed (%) 12/15 (80.0 %) 0/1 (0 %)
KN95 model (total n = 25)
Number Passed (%) 11/12 (91.7 %) 6/13 (46.2 %)