A note about having Polypropylene inside:

In a STUDY by DUKE UNIVERSITY,* masks made of 3 layers: COTTON/POLYPROPYLENE/COTTON were just below N-95 and surgical masks as the most effective face masks.

JENNY’S MASKS are made with 2 layers of tightly woven quilter’s cotton and YOU CAN CHOOSE to add 1-2 layers of POLYPROPYLENE (Smart Fab) sewn in between those layers. 

• Polypropylene is both breathable and prevents water droplets from going through. I’ve tried the “Double thick Smart Fab” and “Regular Smart Fab”. The “Double thick” is pretty stiff and I didn’t like the way it felt/fit. I did however, want to offer more protection so starting Feb 2021 you can choose to have 2 layers of Polypropylene sewn in for a 4 layer mask. It will be slightly stiffer/warmer than my 3 layer masks, but if you want the most protection, choose “2 Layers of Polyprop IN” in the drop down menu for filtration.
•If you are someone who gets warm in a mask, you may want to opt out of the polypropylene lining. You can always nest additional filters, paper towels, or blue shop towels in the back of the mask-tucked in the corners (no cumbersome pocket to deal with). Double masking is also an option. Research is always evolving and so must mask making and wearing!


Jenny’s Masks are not intended to act as a medical device or other medical product and should not be used as a replacement for conventional and approved personal protective equipment, including surgical masks or respirators. No warranties, either express or implied, are hereby given that the mask will prevent infection or the transmission of viruses or diseases. A mask is not a substitute for professional medical advice, diagnosis, or treatment. If you have any specific questions about any medical matter, you should always consult a doctor or other healthcare provider.

*Reference for Duke Study: