Disposable Nonwoven Fabric Filter by The Yard 40inch Wide DIY High Efficiency Filtering Made in Korea (White)

This is the recommended material for lining face masks, because of its electrostatic charge. I have just cut out rectangles that I can fold into a double thickness and insert into the pockets of my masks. For masks with no pocket, I just put this material on the inside, against my nose. It is easy to breathe through and washes without fraying.

This material is being used to make face masks. It is a great to use in between the outer and inner layers of cloth that make up my face masks. I actually make a pocket on the inside of my masks that the polypropylene can be inserted. That way, before I wash my mask, I can take the old polypropylene out and put in a fresh one. This will also work great if you already have a face mask with a filter pocket...say for a PM 2.5 filter. You can add the polypropylene right along with the PM 2.5 for extra protection.It is a good quality, soft and easy to work with. As well, you get plenty of material with this order to last quite a while.

I bought this material to use as a filtering middle layer in face masks. It is soft and flexible, fray resistant, breathable, and easy to sew. I use it in all of my masks.The reason I give only 4 stars is that the material cannot withstand the cotton temperature setting, so I have to use press at the low heat setting for longer periods of time. I also place a layer of cloth over it when pressing. I recommend washing masks made with this filter in cool to warm water and air drying them.Other filter materials I have tried completely melted and stuck to my iron when I tried to iron them. I have not had that happen with this material.

The fabric seems very stable thru washing and drying. I think it is a great inside liner for all of my masks but I need to experiment further.

I went to my local yardage store and they didn’t have what I needed. This was perfect and the price was great. I bought two and I am very pleased.

Works well for masks. Will melt if you iron fabric with filter in it.

The thing I really didn't like is that it is completely non-"ironable". Pretty useless for wrinkly fabrics. The product itself is a good weight and breathable, though. For me, however, a waste. I can't use it for masks, because sometimes I like to press the fabric. This interfacing curls up and disappears.

I am using this product for an inner liner in face masks. Easy to manipulate am lightweight with good protection.