looping clothing animations

[stark dagger]

i wanna have a mask (or other 3D clothing i.e backpack or vest) which contains a looping animation (wether it plays while its held or not i dont really care) putting an animation component on the gameobject doesnt seem to work. im not sure how i would do this.

i suck at speaking lemme try reword

how would i make a mask that has a looping animation when worn, as just putting an animation component doesnt seem to work