covers are environmental friendly. They are made of high quality material
making it soft and comfortable for your face. Inner wire around nose for a
customized fit. Also they are washing machine washable, and should be
washed at a minimum of 60 degrees for reuse.
Size: can be adjusted by tying the knot with elastic band.
Layers: 3 layers (2 layers of fabric + 1 filter pocket to insert
Outer material type 35% cotton 65% polyester.
Inside material is 100% cotton.
Storage: keep in a cool well ventilated area.