mask with exhale valve

thingiverse

I carefully selected a high-quality vacuum bag filter, but finding it hard to breathe through it led me to add an exhaling valve. I designed two versions and printed them with ABS filament, then separately printed the valves and glued them to the mask later on. To ensure a good seal, I recommend painting your masks. I modified this design from a link I found on YouTube created by a doctor. Please note that these masks have not been approved by any medical institution, so if you decide to print and use one, you'll be doing it at your own risk.