Help on how to equip things on Avatar

Im trying to equip the white facemask thing on my avatar to my face, how would i do it? I did it yesterday by accident, then reset my avatar, now im not sure how to equip it again. Im a desktop user and I cant find the function in the Action Menu(R)

any help would be appreciated

have you checked every submenu in the avatars expressions menu it could also be a gesture which you can try by pressing shift + F1-F8