The Amazfit Aeri mask […] comes with removable air filters and will have built-in ultraviolet light emitters. By plugging the mask into a USB-C plug for a few minutes, it can disinfect itself after every use. This would allow each filter to be effective for one and a half months, according to a Huami spokesperson
— Read on 9to5mac.com/2020/05/18/self-disinfecting-mask/
I would totally buy this.