Don't let your headphones get crushed in the bottom of your bag with this protective case. It will likely work with many models, but I specifically designed it for my Sennheiser-EPOS Adapt 660. I also tested it with a friend's Sony WH-1000XM4 headphones.
The case is printed in two halves and should easily snap together. I used PLA and the latch+hinge mechanism worked fine.
Advanced users might have fun using slicer modifiers to vary fill densities and patterns for strength, efficiency, and looks. An example of this is included in the attached .3mf file. See @macro's make+comment.
The author marked this model as their own original creation.