The mask is such a great fit and the airflow is excellent with the filters and no fogging I am getting many comments because here in the hospital no one has it and it looks like I'm going scuba diving but they do see that this is a true mask that would help fight against this pandemic.
Great product I use it everyday
Best customer service on this beautiful earth. Thank you so much Narwal for going above and beyond. #covidfree
Quick delivery. Enough to get me through the pandemic.
I unscrewed all the filter covers and checked. These are extremely easy to replace. I wish I had had this idea. Thank you!
I have not had to use any additional filters at this time but they do appear to be, like the mask, of the hightest quality.
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Like with N95s, our filters are designed for 8 hours of use and filtration efficiency may drop after that.
30 pairs of filters: enough for one month of all-day use or about 4 months of daily two-hour excursions.
Do not allow the filters to get wet. If they do become wet, throw them away and do not reuse.
Our three-ply filters are manufactured in the USA. The central material is tested to the following specifications:
- >99.99% VFE (Viral Filtration Efficiency) in accordance to Spec MIL-M-36954C by Nelson Labs.
- >99.99% BFE (Bacterial Filtration Efficiency) in accordance to Spec MIL-M-36954C by Nelson Labs.
- >99.50% NaCl Efficiency at 32 LPM in accordance to TSI8130 NaCl 0.1 micron particle size.
- >125 CFM Air Permeability in accordance to ASTM Spec D737.
Shipping filters is FREE in the continental US.