The plastic clip on the back of the helmet which holds the goggles can break or get lost.
The uploaded model is from a 3d scan I took of the original clip, with some post processing to simplify the mesh and get rid of artifacts.
I've been printing with PETG. Suggest it be printed on it's side with the clip horiztontal to the print bed, so the layer strength is along the clip. I printed upright and it snapped pretty quickly. Sorry for model file size. I scanned max resolution.
Picture of the original clip (which I broke and had to glue before scanning) and the model.
The author marked this model as their own original creation.