Ill-informed use or manufacture of filters can be life threatening!
Using filter materials such as HEPA, or any extra layers, could cause issues for people with cardiac or respiratory issues. Some HEPA filters could contain glass microfibres and these are irritants to the lungs with potential long term consequences to wearers if used.
In addition, problems are caused if people forget to remove the filters when they wash the masks as the between layers may not withstand high temperature machine washing.
We therefore only supply the Simple Pleated Facemask (Deaconess) made of 100% cotton, or the N95 cotton mask cover. Please remember to:
- Use only two layers of close-weave 100% cotton.
- Not put any other filter layers between the two layers or make pockets for adding filters.
Our patterns do not allow for inserting “nose wires” as these masks need to be washed/cleaned repeatedly at high temperatures at which any metal or plastic inserts will degenerate with use.
Suggestion to improve fit in the nose area: Use a small amount of double-sided medical tape (similar to ‘fashion tape’) to create a seal over the nose. Peel off tape after use before washing.