By accordion fold and nit-tape string, you can adjust both size as you like easily. In case that you can keep social distance, you can move down on your chin and not easy to hurt your ears.
Tuck in edge of strings for ears is to reduce the parts touched your skin as possible.
For the fabric touched mouth, it often gets the stain by lipstick and foundation, we select the different inner color with front one to make it unnoticeable as possible.
Not to lose their shape easily, the accordion fold are also sewed by sewing machine.