Strong and lightweight, polythene mailers are the perfect choice for keeping costs down but also for ensuring products are kept secure and safe during postage. All of our mailers are opaque to keep contents hidden and safe, ensuring confidentiality at all times. Self-seal strips make for easy closure allowing you the flexibility of resizing your mailer to hold the product secure along with providing tamper evidence. The construction of the plastic envelopes makes sure contents are protected from water.