JN Harper - 100% Polypropylene Interfacing

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Quilters Choice Anti Microbial Interfacing

Construction: 100% Polypropylene
Width: 60" wide double folded ... Used as a third layer in mask making

The government of Canada has recently updated their standards for proper material masks. Per the government website, the recommendation of a well made mask will include the following:

be made of at least 3 layers
2 layers should be tightly woven material fabric, such as cotton or linen
the third (middle) layer should be a filter-type fabric, such as non-woven polypropylene fabric

Benefits
Washable up to 50*C (machine wash, hang to dry)
Flexible (can mold into variety of shapes)
Lightweight
DOES NOT deteriorate in the presence of bacteria, mold or other elements
chemically resistant to many oils and solvents excellent moisture resistance