TheraMask by nufabrx offers brand new patented protection powered by CuTEC® copper. Manufactured entirely in the USA at an FDA registered facility, this mask is engineered to be a dependable and sustainable solution to your personal protective equipment needs. Naturally antimicrobial, copper kills up to 99.9% of bacteria. Theramasks serve to reduce microbes both inside and outside the mask and reduce facial contamination via direct contact. These reusable masks are tested via third party lab for efficacy, AATCC 100 and ASTM F2100-07 including BFE (bacterial filtration efficiency). Note: Before purchasing, please check with local guidelines and recommendations to see if this product is suitable for your intended use.