We are exploring some different options for securing the mask to the head while providing adjustability, and I am hoping to get some feedback.
The original design was using 2 rubber bands, each band wrapping around an ear. The challenge with this concept is that a.) it is uncomfortable for long use, b.) a single-size rubber band would be too loose for small head sizes and too tight for large head sizes, and c.) the bands break with excessive tension, and d.) it looks very homebrew.
The latest concept is to use 2 strips of the substrate material (sterilization wrap), staple them to the extremeties of the mask and tie them around the head. This could work, but it introduces an additional cut and assembly process that may be a source of variability.
I would like to propose an alternative for review and feedback. The first part of the concept is to reinforce the holes in the mask extremeties with metallic grommets (shown below):
These grommets would provide the necessary strength to prevent ripping of the substrate. (I believe that doubling-up on the material as shown in the original template file is still a good idea for strength reasons.) These grommets can be applied by basic hand tools purchased from Amazon or craft stores.
After the grommets are applied, we would thread a swimming strap through each of the holes. These swimming goggle straps are already designed to secure and adjust around the head, they are inexpensive and widely accessible. Below is the type of swimming goggle strap that I have in-mind:
Let me know if there are any questions or comments about this idea. Or please share other alternatives. Thanks!