We have received many questions regarding the ideal material options to use for the Origami Mask. We are still exploring options, but our top recommendation at present is sterilization wrap. This material is widely used in hospitals for sterilizing surgical devices and other reusable medical instrumentation. Here is a link to Halyard's sterilization wrap.
Other manufacturers make similar products, and most have published data regarding filtration properties, air flow rates and other data pertinent to the Origami mask. We received this material recommendation from healthcare providers at the University of Florida. Here is a link to the article published on the topic: