Print in Vase-mode! I find the respirator version 4 to be the best.

I used PETG and Line-mode 0.4mm. This enables the PETG to stay flexible and align with the face.

Tips for printing with PETG

• Clean your printing surface(glass was mine) thoroughly!
• Clean your printing surface thoroughly! (use Alcohol or soap)
• Clean your printing surface thoroughly!
• It must glaze like a fresh pressed CD
• print the first layer slowly

Checkout the images for more info!

Cheerios!