Once he’d gotten it buttoned, it made more sense: the top part draped over the bottom, giving the upper part a more voluminous appearance.  It was still too long, though.  He pulled up at the bottom, trying to figure out if there were any more attachments, when he noticed that she was pointing to a belt on his bed.  He grinned and grabbed it, cinching it around his waist, just above his hips.  When he pulled the fabric above the belt, it gave him good freedom of movement.