It is I, Dr. Harnischfechten, coming to you with a helmet overlay that goes on top of your HF-Armory overlay.
After countless hours of prototyping, a few hours of work, and "thousands or hundreds of thousands in R&D", a roll of filament's money (30 dollars~), I created a helmet overlay with a better geometry that would help deflect blows better and has an internal cushioning system that would help mitigate impact.
Printed out of TPU, it will not break; it may, over time, tear, but it costs about 300grams of filament and 24 hours of printing time, which should end up costing about 10- 15 dollars. Will be very easy to replace, especially for folks with import regulations.
Currently, it only covers the top of the head and the sides. It has a strap system to attach to your helmet. It has holes on the back, so I can add a back-of-the-head protector as a standalone overlay later on. Which is in the works, if I add that, it would be feasible to scale it down a little and use it as a standalone mask overlay. After this post, I decided to model a back of the head protector and a spine protection tail as well. So if scaled down slightly, this can be used as a standalone overlay in countries where MOF masks are available, but HEMA overlays, not so much.
https://www.printables.com/model/1708991-hema-helmet-overlay-overlay-tosba-tortoise
Printed on a P1S.
TPU 95A
2 walls.
3 top shell.
%5 Gyroid infill.
Tested in my club, works quite well. Only 300grams.