Its a clip for your tee. This one has no logo so it prints a bit better then the original. I re-made it from scratch since it seemed harder then removing the logo.

I included STEP and F3D files in case someone else wants or needs to modify it. Maybe add your own logo. \_(ツ)_/

UPDATE: I added a version with a slot. That should keep the clip from grabbing your hat so hard if you are worried about it damaging your hat.

UPDATE 2 (The Updatening): Added a slot to the tee hole and fillets to both slots.