How to make a diffuser for your Camping Headlamp.
It is sewn out of non woven polypropylene. You can find non woven polypropylene by searching for "oly fun fabric".
The inspiration for this is the Montebell crushable lantern shade.
There are some written instruction at https://www.campingkitchenbox.com/camping-headlamp-lampshade-take-2