Envelopes Shipping Bags with Self Adhesive, Waterproof and Tear-Proof Postal Bags (White) Product selling points: 1.These poly mailers were white outer surface, black inner lining, so it looks like light grey color not a true bright white. The Mailing Bags used of opaque materials convenient for protect your privacy with a professional appearance. 2.The bags are good acceptable thickness for shipping soft-goods, and they are light enough to safe you some money on weight for shipping. The white mailing bags have a peel-off strip that is very sticky that will seal the bag very well, it's quick seal, no licking or water needed. The poly mailer bags are a good strong plastic shipping bag. If you have many orders need to post everyday, these plastic mailing bags perfect for you! 3.Mailer bags are quite useful for soft items, such like T-shirts, blankets, scarves, or other non breakable items. They are definitely quite durable and the sticky strip sticks very well. 4.The are self-sealing for easy packing with a tamper-evident, super secure closure. Pressure sensitive adhesive provides a high strength, durable closure that is water and dirt resistant. The Plastic Mailing is thin, durable, and quite flexible, so they're very forgiving of weirdly-shaped contents, and it's easy to add in a bit of padding, like newspaper or bubble wrap, for extra protection. 5.Top-quality poly mailers are tear and puncture resistant. Even though poly mailers don't offer interior cushioning, they are made to withstand the rigors of the shipping process.Mailers are a great choice for their high-strength design that keeps contents secure against moisture, chemicals, tampering, puncturing and tearing. Feature: Material: PE,LDPE Size: 12x16+415x19+414x22+417x25+4 cm Product Quantity: 100 pieces in a bundle Scope of application: e-commerce, logistics express bags Package Content: 100 x Express bags