After i made the hole for the mouth, i made this little thing to cover it just like the real thing. the stripes in it are actually airholes so i can slightly breathe through it, but i'm still gonna make something to go on my back which will help air circulation in the mask a bit. i also added some sealing caulk to some of the seams of the foam to cover them up a little. it filled up the seams pretty well which will help quite a bit when i'm gonna seal the foam