Durable: the surface of this bubble envelopes Made from a durable, recycled kraft paper. The interior built with bubble lined wall construction for extra protection during transit, ensure the packages arrive in great condition Tight seal: The Self-Seal closure provides a reliable, tamper-evident tight seal to secure all enclosures. Extra smooth surface is perfect for handwriting, labeling and stamping These mailers are excellent for mailing papers, documents, letters, photographs, paintings, small Items, jewelry, stones, coins, buttons and many more Self sealing bubble mailers provide outstanding low cost shipping protection for a wide variety of products