Effective, durable, and wash-resistant antimicrobial finishing of textiles such as work clothing for medical personnel, hospital beddings, or face masks can significantly reduce the risk of infection. Although work was already underway on this topic before the outbreak of the corona pandemic, it has certainly gained further momentum as a result of this crisis. Special textile finishing of this kind is made possible by a new, ultrasound-based process, the so-called Sono Finishing technology. It also offers great potential for minimizing the environmental problems typically associated with conventional textile finishing.