Fosmon 9" x 12" Self-Seal Tear-Proof Polyethylene Mailers offer a reliable and durable solution for secure and cost-efficient shipping. Designed to protect your items during transit, these high-quality polyethylene mailers are water, tear, and puncture resistant, ensuring the safety of the contents within. Each mailer features a high-strength adhesive closure that is both water and dirt resistant, providing a dependable seal. The silver inner layer enhances confidentiality by obscuring the contents of your packages, making it perfect for sensitive shipments. These self-sealing poly mailers are ideal for shipping a wide variety of non-fragile items, offering both durability and convenience. These lightweight poly mailers are designed to save on postage costs while offering the strength necessary for over-stuffing, thanks to their high-strength seams. The surface is compatible with ink, stamps, and labels, making labeling and branding simple and efficient. Suitable for use with all major carriers, these mailers provide a versatile and secure option for your shipping needs. Perfect for businesses and individuals looking to ship items efficiently, these 9" x 12" mailers ensure that your packages arrive in excellent condition, protected from the elements, and are easy to handle. Package contents: 300-Pack Self-Seal Polyethylene Mailers (9 x 12 Inch)