Vintage kraft paper material, showing unique flavour The use of high-quality old kraft paper to create a natural surface texture and slightly yellowish colour, giving the cover a retro nostalgic atmosphere, each cover seems to carry the story of the years. Kraft paper material is thick and tough, with excellent tear and wear resistance, can effectively resist the friction and extrusion in daily use, to protect the internal documents, cards, photos and other items from damage, taking into account the aesthetics and practicality. C6 standard size, suitable for a variety of needs Strictly following the C6 international standard size (162114mm), it is perfectly suitable for postcards, small greeting cards, invitations, bills and other items of similar size, and can also be used to store business cards, handbook stickers, photos and other small items. Whether it's encapsulating business letters or storing materials for handbook lovers, it's easy to do, providing just the right amount of storage space for your items. Windowless design, guarding privacy and security The windowless design avoids leakage of internal contents and fully protects the privacy and security of documents, especially suitable for encapsulating important information and private letters. Simple and generous appearance, providing you with the freedom to create space, you can according to your preferences in the envelope surface writing text, drawing patterns, or paste stickers, tape and other decorations, to create a unique and exclusive envelope, to show the individuality of the style. Convenient sealing method, easy and worry-free encapsulation The cover is equipped with a practical sealing design, the seal is coated with strong environmentally friendly glue, just gently tear off the protective film and press the seal to firmly seal, the operation is simple and convenient, without the need to use additional glue or tape. The strong adhesive seal is not easy to come off, ensuring that the contents are safe and secure during transport and storage, and effectively preventing them from falling out or being lost.