Widely Use There are 12 sizes for you to choose, so they are perfect for shipping a wide variety of items. They can be used in offices, at home, in shops, schools and everywhere where there is a need for shipping. USPS / UPS / DHL and FedEx approved. Lightweight and Opaque These bubble mailers are lightweight and do not add to your shipping costs. The padded mailers are completely opaque and protect the shipped item from prying and curious eyes. Premium Material Made of 4-layer composite kraft bubble film, water resistant, moisture resistant, tear resistant, shake and fall resistant. Best Protection The padded mailers interior built with bubbles and reinforced 1cm edge to provide cushioning to reduce shipping damage for ensuring the packages arrive in great condition. Surface made from durable premium kraft paper. Interior padded with advanced low-density polyethylene 1/8” bubble to provide extra protection during transit. Strong self-sealing adhesive strip. Simply peel and fold over to seal each package safely and securely. Extra large self-seal flap for full coverage. Cost-effective and efficient way to ship your products. Highest quality Kraft mailers made in the U.S.A. Approved by all shipping carriers including USPS, UPS, FedEx, and DHL. Listing and template services provided by inkFrog