Custom poly mailers are a popular choice for all ecommerce businesses. Equipped with an adhesive strip for sealing. Packaging is both simple and fast, providing a great way to ship your goods. Not only are they quick and efficient, they are also water resistant and tamper evident, allowing you to ship your items confidently. Poly mailer bags are extremely cheap, lightweight, and take up less space than boxes. They're perfect for non-fragile items. Get mailing envelopes printed with a matte or glossy finish. Sealed with a peel-and-seal flap.