I saw the masks and filters when I purchased a briefcase from here. I love the mask/filters and recommend.
Excellent quality, fast delivery and reasonably priced.
Much more comfortable than the other types of maskes I had been using
It looks and feels like great quality product. I definitely recommend this filter.
It's crazy how inexpensive these are compared to other places I've had to purchase the filters. Also, they ship these right away. When I've ordered from other sites it takes forever. Snag them while you can I say!