This mask is two layers of 100% cotton, with a pocket so you can add a filter material if you'd like. The mask straps go around the head so it doesn't bother ears. The mask is machine washer and dryer safe.
 
Some customization options:
Tighten the strap by adjusting the length of the elastic.
Insert a filter material (paper towel works well) between the layers.
Insert straws into casings on sides to stabilize.
Remove straws and filter before washing and drying.