Just ordered a linen mask from Etsy. After ordering and paying it tells me it is shipping from Lithuania or some country in that region. This should be interesting. Oh well. lesson learned. Not sure it would be a good idea to go into area where mask is required, and be without one. However, some of the masks do make it difficult to breath. Even though I have oxygen therapy my oxygen levels are usually in 92 to 98 area. Predominately 94. I have taken it upon myself to do without the oxygen. May not be a good idea on my part. However, I have not used o2 for 2 - 3 weeks. Swept out garage and cars today and level is at 97.