💜Widely Use：100 pack Envelope Mailers 10x13 inch In Sakura Pink are quite useful for soft items and middle size products, such like T-shirts/jeans/baby products/snacks...they are definitely quite durable with excellent Self Adhesive Strip. | 💜Eye Catching Options：These Middle Size Shipping Bags were Sakura Pink outer surface,black inner lining.The 10x13 Poly Mailers used of opaque high-quality materials convenient for protect your privacy with a professional appearance. | 💜Light Weight：This kind of Mailing Bags with Lightweight design that save your shipping cost 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. | 💜Waterproof：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.They provide the ultimate protection for your mailing no matter Rain or shine. | 💜Durable Protection：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. A poly mailer is usually made of polyethylene but can also be made of heavy-duty nylon fibers.Poly mailers are a great choice for their high-strength design that keeps contents secure against moisture, chemicals, tampering, puncturing and tearing.