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.