Fashionable Colorful Poly mailers- With trendy colors, these shipping bags are sure to make your package stand out and leave a lasting impression on consumers. These chic shipping mailers are smooth to the touch, measuring 12x15.5 inches, and a pack of 500 mails. Sturdy & Durable Construction- Our plastic mailing envelopes are made with premium-grade virgin Polyethylene plastic which is tear-resistant, puncture-resistant, and waterproof. And every mailer is equipped with tamper-proof strong self-sealing adhesive strips. You can rely on our postal bags to withstand various factors and ensure that your package is safe before it reaches its destination. Convenient & Economical- The packaging bags can be sealed within a few seconds by peeling and exposing the glue, without the need for packing tape and a pulse sealing machine. Plastic custom mailing bags are a great alternative to bulky and expensive shipping boxes. Mailing envelopes are lightweight and space-saving, which can help you save on postage and costs. Widely Use- Multipurpose envelopes are great for shipping light and less fragile products, such as clothing， books, jewelry, accessories, etc; professional packing to protect your item. Perfect for online retailers, clothing boutiques, office supplies, family, stores, crafts, schools, and warehouses. Metronic Products- Metronic is constantly committed to providing more unique, high-quality, and multi-functional poly mailer bags to make your retail, transportation, and packaging products stand out. If you have any questions, you can contact us at any time and Metronic will solve them for you in time. The poly mailer is lightweight self sealing poly mailers envelopes bags flat poly bags are designed for shipping non-fragile items that need minimal protection during shipment or are already packaged within a protective material. they are commonly used for shipping soft goods like books clothing and bedding or items packed within a protective package like shoe boxes, or other non breakable items. Durable polyethylene film moisture resistant opaque for privacy recyclable. The Plastic Mailing is lightweight, strong extremely.