- Non-woven spun-bond polypropylene
- 1.25 ounce per square yard (on par with most surgical masks)
- 20 inches wide
We recommend using this filter material in conjunction with tightly-woven quilting cottons for a stylish design and good quality filtration. This material has a melting point of approximately 320F. Do NOT use iron directly on the mask filter material. If you must iron your project, be sure to use a low heat setting and a pressing sheet or other heat barrier.