Ecomm Poly Mailer Shipping Envelopes Shipping envelope bags in White/Grey with Permanent Adhesive Strip. 2.5 mil thick and not see-through. Sometimes called a "mailer" or "mailing bag" or a "soft pack". We call these mailers, e-com envelopes, shipping bags, or poly mailers. We stock and sell these in Canada. Sold per 100. Poly mailers are made from virgin material, and are recyclable in some Canadian provinces.
