|ASTM FACE MASK||BFE %||PFE%||SDP mmhg||DP H2O/m2||FLAMMABILITY|
|Level I||≧95%||Not required||80||<4.0||NOT FLAMMABLE|
|Level II||≧98%||≧98%||120||<5.0||NOT FLAMMABLE|
|Level III||≧98%||≧98%||160||<5.0||NOT FLAMMABLE|
They were all tested with ASTM F2100 Standard and passed very strict professional testings. Each level has different patterns, such as traditional blue look for surgical use, customized pattern with creative artistic design. Please don’t ignore the quality because of their beauty value. They are all of Medical grade quality.