I have improved the design of this mask making it a little bigger!!
This mask is made of two, tightly woven cotten fabric layers. It has an opening avail to add extra filtration. It also features a wire sewn into the top where you can adjust it snugly to your nose. It has two elastic (elastic hair ties) to go over your ears , keeping it snugly in place.
** I have read that this way of making masks is about 78% effective in protection. Adding Vaccuum cleaner bag material makes it about 95% effective
These would also be great for cold weather training.