The S-Shield’s NANO-fiber membrane filters are more thickly woven than standard filters (60g/m2 meltblown). The Cloth Bandana Nano Filter Mask provides a much much higher filtration efficiency while retaining very good breatheability. The filter efficacy is 96.9 % means it is almost as good as FFP3/N100-level filtration. NANO fibers are water-wicking, so you can keep the filter in your mask and wear it all day without it becoming wet and soggy.
NOTE: for highest filter efficacy, the filter should be changed out after each 8-10 hours of use, or each day. The S-shield comes with 3 filters; one already in the mask, and also two replacement filters that can be easily inserted.Additional filters sold here SKU #S-N95
Color Choices are: