This mask has cotton on the inside and a light fleece on the outside. I do not know the studies of not using double cotton, so this may not be the most protective fabric.
Good to keep you warm on the hill or on the flat land!
This mask has cotton on the inside and a light fleece on the outside. I do not know the studies of not using double cotton, so this may not be the most protective fabric.
Good to keep you warm on the hill or on the flat land!