In Kuwait I couldn't find supplies of clear sheets with <1mm in thickness, so the stiffness was greater than what the mask could handle. I modified the attachment pins for rectangular boxes with holes to either secure the shield with M3 screws or zip ties. Another thing the strap may now be 3D printed, it has a 0.5mm thickness which can bring any material to be flexible. Unless you're printing with steel.
Initial Layer: 0.2mm
Layer height: 0.25mm
Infill: 20%
printed with PLA pro, our own brand of filament.
But you can still print with normal PLA and still save lives.
The author remixed this model.