Boards
Most ludicrously over-packaged item
It's formal shirts, isn't it?
You've got the two clips holding it together at the back, and the one clip in the middle, plus the clips holding the sleeves to the trunk, plus maybe that dongle thing between the cuff holes, plus the cardboard keeping the collar in shape, plus the plastic thing under the top button, plus the cardboard keeping the trunk in shape, plus the tissue paper.
That's discounting any labels that are on the shirt. Then the whole thing's wrapped up in plastic.
It's definitely formal shirts.