Face Mask Strap Compatible for Horizontal and Vertical Strings

thingiverse

I remixed the original design because some masks, like the 3M ones, have two horizontal strings instead of the vertical ones found on surgical masks. This simple yet effective modification allows the string or rubber band to follow a path, making it compatible with both types. The only thing worth noting is that the last two teeth are somewhat fragile, so avoid pulling from there once printed. I experimented with this to see if those teeth would hold up when worn normally and it seems to work quite well. If you're concerned about its durability, consider using PETG instead of PLA as it's more resistant to snapping off and flexes better. I later reinforced the last two teeth so they wouldn't break when peeling them off from the edges. Now, both PLA and PETG should be suitable options.