I am unreasonably annoyed by the trope of races based on animals using ear holes in their clothing and especially armor. The Raison d'etre of a hat is to protect the wearer from sun, rain, cold, wind, or blunt force. Nobody but nobody is going to ignore the most delicate, sticky-outy parts of their head when designing a hat.
With that rant out of the way, here's how I've dealt with this problem for my monkey foxes.
Yinrih ears, like those of Terran canids, are motile, cartilaginous structures that serve a few functions beside the obvious entry point for sound. They help with thermal regulation, and they play a role in communicating emotion visually[^1] in a similar manner to human eyebrows.
The first problem one encounters when developing headgear is that it's uncomfortable to have weight pressing on the ears. One solution, employed by healers' cloaks[^2] is to have a support that keeps the cloth above the ears and allows them to swivel.
The other solution is to have rigid, form-fitting ear guards that protect the ears at the cost of limiting their mobility. This approach is used by powered armor helmets as well as in healers cloaks.
The guards used by healers are usually plastic or cardboard and are worn under the cloak.
Powered armor used by peacekeeping and law enforcement additionally use the ear guards as identifiers. The backs of the guards have colored retro-reflective chevrons that indicate rank or role.
Thoughts? What about other common nonhuman racial features like horns, tails, wings, or trunks?
[^1]: Yinrih primarily rely on pheromones, both through an ambient musk and via their ink, to communicate emotion, but can use ear and eyelid position to convey acute emotional reactions. Since humans cannot detect yinrih pheromones, yinrih who spend time with humans learn to be more expressive with their ears in order to make up the difference. [^2]: Healers take drugs to render themselves hairless save for the whiskers. They are the only yinrih who regularly wear clothes, in order to protect their now furless skin from the sun.