This Progo Poly Bubble Mailer is a lightweight alternative to traditional envelopes, providing excellent protection for your items during shipping and mailing. These bubble mailers are made of premium bubble lining film, which provides durability and puncture resistance. The self-sealing adhesive strip is easy to use and ensures a secure closure, protecting your contents from moisture and tampering. These bubble mailers are perfect for shipping a wide range of items, including books, CDs, DVDs, and other media, as well as clothing, accessories, and other non-fragile items. The 8.5 x 11 inch size is perfect for standard-size documents and items, and the bubble mailers can be easily folded for convenient storage.