* Experimentally proven to effectively block airborne particles and bacteria, as well as various epidemic viruses
* Helps to eliminate planktonic bacteria, influenza and other viruses, reducing the chance of being infected or infecting others
* Suitable for everyone, especially suitable for sick patients / people with low immunity / BB / children / pregnant women / elderly / long-term access to hospitals and clinics with more bacteria
* Can remove planktonic odor, smoke and sweat
* Valid after opening 30 days
* With neck strap
* Attachment: body x1, neckband x1
* Expiration date: 30 days after opening the cover, it is invalid and needs to be discarded.