Keep important items protected while en route with the Mailer Envelope Kraft Bubble. It has a quality design that will keep your products secure as they re transported. The bubble envelope has a kraft color offering a neutral look. The package is simple to seal closed so you can have your items ready to mail out right away. The 20 L PK50 39UK92 self-seal bubble mailers make an ideal option for sending items that need a little cushion.