Bosal Polypropylene for Mask Filters 20in x 5yds - Bosal 310 red The smart GO

The smart GO

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Bosal Polypropylene for Mask Filters 20in x 5yds - Bosal 310 red The smart GOAdd an extra layer of protection in your face mask with Bosal's Polypropylene Mask Filter Material. This breathable, nonwoven material is now a recommended material for homemade cloth face masks. Bosal's Polypropylene is machine washable, but it should not be tumble dried or ironed as it may melt. Polypropylene is a type of plastic that feels and cuts like fabric and won't fray. Bosal's Polypropylene Mask Filter material comes on a bolt and measures