Broken Elytra Custom Origin

I've been using datapacks to make custom origins to use with the Origins mod. It's going well so far, but I was wondering if there's any way to give the player a pair of broken elytra (not in the chestplate slot, but separate, like the Elytrian origin.) I know how to give them normal elytra but I was wondering how to give them non-functional elytra for roleplay reasons. Does anyone know how to do that?
Thanks!