Parametric PPE 3M compatible half-face mask

3D printable using PLA and TPU or other flex filament. Customizable scale in the fusion 360 files use the 'scale_factor' parameter to size for different people while retaining the correct connector sizes. The STL files are equivalent to the 3M L size half face respirator.

The holes for the straps are sized for standard shoelaces.

There is a version of the frontplate with no purge valve to improve protection, this is much easier to get working right. I suggest starting here.

The strap holder part is optional but is to be printed in TPU and used to stop the straps moving around on the head.