To safely deliver the package there are different kinds of postage mailer bags that protect the fragile things from breaking. We are sharing a freebie today which is a free Metallic Bubble Mailer Mockup, this reflective postage bag mockup is very easy to customize simply drag and drop your artwork inside a smart object. Besides this, you can also change the color of the free metallic bubble mailer mockup with a simple one-click. Available in a very high-resolution file this free mockup PSD comes with commercial and personal licenses.