Poly mailers ensure your parcels arrive intact and tamper-proof. These bags are lightweight, protective, and made from a durable, three-layered moisture-resistant poly film, thus providing superior weather resistance. E-commerce companies use them frequently due to their reusability. Invoices and addresses can be placed in the self-adhesive pocket that comes with the tamper-proof POD jacket. This pocket cannot be opened after sealing, ensuring maximum security.