Triplast Grey Mailing Bags (12x16", Pack of 100) offer a superior, secure, and sustainable packaging solution for e-commerce, retail, and personal shipping. Constructed from a robust 3-layer co-extruded film with a 55-micron thickness, these poly mailers provide exceptional tensile strength and tear resistance, far surpassing standard options. A key feature is the black inner layer, which guarantees total opacity to conceal contents for maximum privacy. Security is enhanced by the 40mm tamper-evident peel & seal closure. This extra-strong adhesive strip tears the bag upon opening, making resealing impossible and alerting recipients to any interference. Lightweight yet fully waterproof, these bags effectively protect items from moisture, dirt, and handling damage while keeping postage costs low. As an eco-conscious choice, they are manufactured from recycled polythene and are themselves fully recyclable (Code 4 LDPE), combining performance with sustainability.