Sensible Mailers™ 100% Recycled Poly MailersEco Friendly recycled mailers protect products from Tearing during shipping.Mailers are puncture, water, tamper, and tear resistant.High strength seams will keep contents intact, even if over packed.The outer surface of the mailer is Grayish and varies slightly in color because of the recylcled content.Labels, stamps, and ink adhere well.Self-sealing.