Unlike conventional masks, the Kuhn Copper Mask and Kuhn Copper Insert are reusable. The outdate is two years.
The Kuhn all Copper Mask and Kuhn all Copper Insert will self-disinfect within 10 minutes, but can be immediately disinfected by rinsing in rubbing alcohol (isopropyl alcohol).
Copper mesh is highly breathable, allowing air scrubbing. Typical surgical masks are made from layers of woven fabric, reducing air flow, making breathing difficult and causing glasses to fog.