Note: this includes LaFactoria3D's original mask parts that this is designed to fit. It's a great design, and I include it here because they have sinc...e updated it in a way this cannot fit. If you feel their updated version provides better protection I urge you to use it instead.
Replacement cap for LaFactoria3D's COVID-19 MASK
This model is by request: a more enclosed cap that provides greater protection for the wearer. It clips in place of the original cap, doesn't interfere with airflow, is lightweight, and fits under face shields. This prints quickly in its current orientation without the need for supports, and the snout being flush with the hot bed will provide a smoother cover that can wipes clean easily.
Version 3: holds in place more securely, still provides "splash" protection, has good airflow, and prints a little more quickly (still no need for supports.)
What's changed: I over-thought versions 1 and 2, ending up with klunky designs that clipped in place differently. As a result, some prints held in place snugly while others popped off when struck. Plus they reached so far to the sides to ensure protected airflow that I worried they could snag on something by accident. Fortunately on V3 the airflow is still smooth unobstructed with these smaller outlets, and the long vanes inside the vents provide decent side protection. V3 also fits securely in place like like the original cap from LaFactoria3D that this mask base was designed to fit. Plus this new one prints more quickly and requires less material.
If you find any issues with it or think of ways to improve its design, please let me know. Feel free to modify this and share it to the community.