I, too, am making face masks. I have "collected" quite a stack of Batik FQs, for what I do not know. But they got washed yesterday, and I found a couple yards of white flannel in the stash, and lo and behold I found a mostly full 100 yd roll of white bias binding, so the stash is getting busted nicely. I also found elastic, but the stretch does not return when pulled, so it will get discarded, unless I decide to use it for ties too. So today will be spent sewing.