Different clothes in mirror

Hey everyone so im new to this stuff but I got a new avatar recently and when I go up to a mirror it shows my reflection wearing a mask and horns when I dont really have them on. Is there a way I can always have the mask and horns on and not just on my reflection using unity?

Shaders can make it so certain objects only appear in a mirror or not appear in the mirror at all.

Assuming this is an avatar you uploaded to VRChat, what shader are you using for it?