Durable & Lightweight Material: Durable poly mailers can be stretched 3 times longer than usual, it will protect your product. Only 1.9lbs, it is lightweight to carry and save your cost. Wide & Friendly Use: Built in self adhesive strip is convenient to pack and it'll not open even pull heavy. Suitable for your business, office, individual store and express carry facility. Waterproof & Tearproof Design: Reliable anti cracking material even if you pull it by strong power that it'll not burst. Self-seal strips with water and dirt proof materials make the pack durable. Enhance the Privacy: The mailer has a white outer surface and black inner lining, its opaque materials and reinforced adhesive tape will not show what is inside. Strong edge sealing to avoid the package breakage during shipment. Attentive & Responsible Support: Any further assistance about your order please contact us, our dedicated support will answer in time. Order from us with confidence.