The RU-50 Mask is a 3-layer reusable mask, that can be washed up to 50 times. It should be washed after each use. The mask is made of antimicrobial material helping to reduce potential contamination. The RU-50 mask can be fit comfortably and snugly to your face by using the adjustable nose wire and ear loops. This mask can contribute to the protection of a whole group wearing this mask.