These are mask protectors. They are designed to hide your mask underneath. There are two different types and two sizes of the first type. Printing is easy with FDM, there is no support needed, with 0.35mm layer height, printing time takes around three and a half hours. I've created a dense topology to print it smoothly, but there are low-poly versions as well. You can adjust further the stems with a hairdryer. Given the current situation I've reduced the price.
WARNING!
PRINTING Printing is easy with FDM, there is no support needed, with 0.35mm layer height, printing time takes around 3-4 hours. Please keep in mind that the average eye-distance is around 68mm, but varies individually! Adjust the size before printing! You can adjust further the stems with a hairdryer.