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PJ7 Poly Mailers are among the largest in our range measuring 500mm x 353mm. These dimensions make them big enough to carry a standard sized shoe box and is also ideal for sending bulkier items such as knitwear, bed linen and large tablet computers. These poly mailers are more environmentally friendly than other poly mailers on the market as they are made from 75% recycled material. They're also tear and puncture resistant due to their extra strong 75 micron grey polythene which has a multi layer structure, providing reliable waterproof protection for your items in transit. One big advantage of poly mailer bags is that they are extremely light so your postage costs are minimised. The PJ7 size weighs just 17g and comes fitted with a self-adhesive strip, making it extra quick and easy to pack securely.