While similar, bubble mailers and padded mailers have features that set them apart from one another. Padded mailers use layers of paper or foam wrapped in kraft paper to protect mailed items. They contain no bubble wrap. These are fine for objects that aren’t easily damaged.As we have mentioned, bubble mailers feature bubble wrap on the inside and paper or plastic on the outside. You can choose your level of protection based on bubble size. Further, bubble mailers with a plastic outer material provide some protection against moisture.