The mask consists of the antibacterial substance SILVERPLUS. This material inhibits the growth of bacteria, inhibits odors, maintains good hygiene and has antiviral properties in textiles. How does SILVERPLUS work? - blocking oxygen-carrying enzymes - activating sulfur-containing proteins in odor-emitting bacteria - locking the cell membrane The protection works for a maximum of 10 to 20 washes. After 20 washes, the effectiveness does not disappear, but begins to decline. Masks in two sizes 👌