I have been testing and trying samples of many different kinds of masks available on the market over the past few weeks. The one that I have to endorse would be the options from Threadless. I liked them so much that I have designed my own line of Halloween face masks!
The best part of these masks are that with each one purchased a donation is sent to Medshare. MedShare is a humanitarian aid non-profit organization dedicated to improving the quality of life of people, communities, and the planet. They source and directly deliver surplus medical supplies and equipment to communities in need around the world.
These are not available through this shop interface and instead are at