These no frills basic t-shirt face masks are made for us by Refried Apparel, an upcycler of unsold college and professional sports apparel. They re-purpose traded sports player jerseys, unsold designs, and misprinted garments destined for landfills or incinerators. Using these garments, they cut and sew new creations at their mill in New Bedford, Massachusetts. Made from Colby blue 100% cotton and cotton blend t-shirts, these 2-ply masks provide filtration and particle capture as well as breathability. This is not a medical-grade mask.