HIGH QUALITY SELF-SEALING MAILERS: Made of high-quality PE material, stronger bearing capacity, wear-resistant, water-resistant Absolute confidentiality: tear-resistant self-sealing envelopes, strong viscosity, improve the security of your package. These multicolored letters had a white outer surface, and a black inner lining, so it looks like a light gray rather than a bright white High Efficiency and Lightweight Mailing: Light enough to secure some money on shipping Suit for sending clothes and other unbreakable items Suitcases Shipping for packaging clothing, apparel, jackets, jackets, T-shirts, small backpacks, handbags, wallets, shoes, books