Half mask

TL:DR;
Size L fits most men, size S should fit most women and children above 14 (guessing).
Parts of the valve start with V,
parts of the filter assembly start with F,
second letter if present is the type (see photo) of filter that part is for: F - round on, S - pear-shaped one.

Printable with minimal supports. Valve membrane should be used as a template to cut out from proper membrane material like silicone of some stiff foil.



Long version:
Right before the quarantines started in Poland I noticed there were no half-masks available to buy any more so I decided to make some for the filters I had around.

Designed the parts so that there are minimal amounts of support needed. Support is required on:
-F sleeve
-F locks
-masks themselves
everything else you should print without supports, laying on the flat sides.

I printed with 0.5mm nozzle at 0.16 and 0.2 layer heights. 2 perimeter walls are sufficient with nozzle this wide as the parts are really stiff and none