I see you humming, and it makes me happy. All cotton masks are 100% cotton exterior and 100% cotton flannel lined interior. Interior is pocketed to put additional layers of filtration. **please note that inventory numbers reflect the numbers of masks we can make from this fabric, and not the number of masks currently made up** ~:Your mask(s) is sewn in the order we get it, additional add on order after the inital order will reque your o