Pen+Gear Kraft Bubble Mailers provide a protective cushioning when shipping fragile items. Air-filled bubbles lining the inside of the mailer help soften the impact of handling during transit and the Kraft exterior adds an additional layer of durability. Each shipping envelope has a quick and easy Peel & Seal closure?no moisture required. Just pull off strip and press to seal. Keep shipping costs low with lightweight mailers that require less postage than shipping boxes.