A note about Mistyfuse and Masks, in the time of COVID19
The answer is yes it is.
Mistyfuse is inert, has resistance to moisture, and most importantly Mistyfuse is made without industrial additives commonly found in fusibles, such as solvents, blow additives, and body modifiers. Mistyfuse does not off-gas when ironed. And there are NO surface adhesives added. Those temporary surface adhesives gum up needles and can turn hard and crumbly over time—and with Mistyfuse you don't need them! With Mistyfuse, just a swift poke with the tip of a hot iron acts like a temporary pin—making it easy and safe to remove and place someplace else with no residue left behind. The structure of Mistyfuse's engineered true-web allows it to handle like a fabric and be breathable. Instead of holes from stitching, this web melts into and becomes entwined with the fibers of fused fabrics.
Please wear a mask. Stay safe. Protect yourself and others.