Our grey mailing bags are made from strong, co-extruded, polythene. The 40mm lip includes a peel and seal adhesive strip for an efficient and secure permanent closure. Our range of sizes is specially designed to be lightweight and fit within the Royal Mail PIP sizing to minimise postage costs. These are suitable for smaller items, textiles, and printed literature through to larger boxed items, or as an alternative to courier dispatch sacks. These poly mailers can be written on, and accept adhesive labels and stamps. We also stock red, blue, white, clear, purple and green mailing bags, all available until 3 pm on a next day delivery. These bags are environmentally friendly, fully recyclable, and tear and water resistant.