Dear Friend ,

As part of the global efforts in the 3D printing community to take their part in fighting the COVID19 pandemic we have created a new mask design where changing HEPA filter is super easy; the filter area is a circular area with a 5mm wide slot from the top that should fit tight to a custom made circular filter, we hope this design can help in any way is saving lives in your local communities, if you managed to print our this design please share the results with us on email or social media.

https://www.thingiverse.com/thing:4262734

Thanks you for taking the time to read this email ,we hope you and your beloved ones to stay safe.