pack of 10 comfortable, breathable face masks; stretchable earloop, one size fits most 3-ply earloop masks available in black (or white). But leave a review and let us know what other colors you'd like to see. the product is disposable, one-time use.  made at Shandong Tricol Marine Biotechnology Co., in Shandong, China. For more information about our factory, visit http://tricolgroup.com/. Each set of 10 face masks is in a sealed bag and includes a production date stamped on the package.   Our masks meet type IIR requirements per EN 14683:2019, which is the European testing standard equivalent to ASTM Level 3 with regards to bacterial filtration efficacy, differential pressure & splash resistance  Q/370700; XK001-2020; the 3-ply mask layers contain: * Outer/Inner Layers: spunbond PP non-woven fabric * Middle Layer: high-efficiency electrostatic filtering material Model # XK1302