How To Store New, Unused N95 Masks?

I know that it’s recommended to store N95 masks in a paper bag in between uses, but what about new, unused masks? Ideally I would want to store unused masks together since I’m buying a 50 count. I don’t want to have to individually but each mask into 50 different paper bags. Also, when storing masks between uses, should the paper bag be folded closed? I saw a video that had the masks hanging by its straps in an open paper bag, so I’m not sure if it’s supposed to be left open or closed?