Poly mailers are polyethylene shipping bags that are waterproof, tearproof, self-sealing, and tamper-resistant. They are considered the best choice for e-commerce shipping as they are self-seal and tear-proof. You can find them in different sizes and colors, we have a huge selection. -- Poly mailer bags are technically defined as ?polyethylene mailers,? and are lightweight, weather-proof, easy-to-send envelopes often used as a shipping alternative for corrugated cardboard boxes. They are easier to store than cardboard boxes and can be customized with eye-catching design components to boost your brand and make a statement with your shipping. Poly mailers are also flexible, self-sealing, and ideal for shipping apparel and other non-fragile items. They are usually the most affordable way to ship soft goods like apparel, blankets, purses, and backpacks. Poly mailers, shipping bags, shipping mailers are fabulous for shipping a wide variety of items. Self sealing, poly mailer bags, provide outstanding low-cost shipping protection. Upgrade your company image and ship with confidence with these self-seal mailers. Maximize shipping success while reducing costs. Shipping labels adhere securely to them. --High Quality Poly Mailer bags Designer Self Sealing Mailers. - Self-Sealing Poly Courier Shipping Mailers! - UPS, FedEx USPS APPROVED - Superior tear and puncture resistance. - Pressure sensitive adhesive provides a high strength durable closure, water and dirt resistant. - Water, Tear and Puncture resistant. - Lightweight saves on postage - High strength seams allow for over-stuffing. - Buy with Confidence! Fast Shipping!