I wanted to print some Ear Savers for medical staff (or anyone who has to wear a face mask), on my smaller printer, which is less than 120mm wide. Almost all the models are too big and I didn't like the ones I did find.
This one prints fast. I can print 4 of these on my Monoprice Select Mini in under 45 minutes, at 0.4 mm line width. They are strong and the keep the elastic straps in place better than other Ear Savers I have seen. Tested to over 35 lbs force before breaking with PLA.
I included a second version with the word "HERO" in the middle.
This design is on the US Department of Health website. https://3dprint.nih.gov/discover/3dpx-013640