Covid 19 mask with exhale valve by kkut

I used a really good quality vacuum bag filter but it was difficult to exhale so I added an exhaling valve and made two versions printed them with abs filament and printed the valves seperately gluing them to the mask later on. I would also recommend to paint your masks to have a good seal.

Note: I actually remixed this from a link which I found on youtube which was made by a doctor