Covid-19- Czech army mask update to output filter

grabcad

This mask (M10) excels in filtering out COVID-19, but its simplicity lies in a basic valve for releasing air. The air that escapes remains unfiltered. To upgrade it to a 100% effective filtration system, you can print three separate parts and combine them with the mask. You'll also need to add a textile circle, which should be cut to size, into the design. Don't forget to secure two of these printed parts together as well before adding the final component.