21cm (length) x 13cm (width) Flap: 4cm Key Features: * Polyethylene exterior, tear-resistant and water-resistant * Built-in bubble cushioning protects items from impact * Sealed with a sealing sticker for quick packing and improved work efficiency * Compatible with various mail services such as Yu-Packet and Nekopos * Clean white color makes it easy to write addresses and slips clearly * Thin and slim envelope reduces shipping costs Product Description: Enhance your sales power with high-quality cushion envelopes that professionals recognize! The exterior uses water-resistant and tear-resistant polyethylene, and the interior has built-in bubble cushioning that excels at shock absorption. It reliably protects your important items. The sealing sticker eliminates the need for troublesome tape. Anyone can easily achieve professional-grade packaging, significantly reducing work time. The pure white and clean appearance is highly appealing. Addresses and slips are easy to see and write on clearly, preventing errors. The thin and slim design reduces the thickness during packaging, contributing to lower shipping costs. We offer a wide variety of sizes compatible with all shipping services, including Mercari Bin, Yu-Yu Mercari Bin, and Yafuneko! Pack. Reliability and proven results that lead to repeat customers. High-quality and efficient packaging directly increases customer satisfaction and boosts sales power. Experience the secret weapon that will make a difference in your sales! Material: Pearl Film + Polyethylene (PE) Exterior: Special specification combining a luxurious pearl film and durable polyethylene. Beautiful appearance and excellent protective performance. Keywords: 1. Cushion Envelope 2. Envelope with cushioning material 3. Bubble wrap envelope 4. Air cap envelope 5. Packing material 6. Shipping envelope 7. Envelope for mail order 8. Waterproof envelope 9. Moisture-proof envelope 10. Tear-resistant envelope 11. Water-resistant envelope 12. Polyethylene envelope 13. PE envelope 14. Pearl film envelope 15. White envelope 16. Easy-to-print envelope 17. Easy-to-write-on envelope 18. Mercari envelope 19. Yahoo! Auctions envelope 20. Rakuma envelope 21. Yu-Packet compatible envelope 22. Yu-Packet Post delivery 23. Yu-Yu Mercari Bin compatible 24. Yafuneko! Pack compatible