Specification: Type: Poly Mailers Material: Polyethylene film , 100% recyclable Color: Silver Sealing Flap: 1.57" Wide range of uses are Available in a variety of sizes, they can be used in company stores, schools, and for UPS/DHL/USPS/FedEx packaging Features Waterproof, Dustproof, Tear-proof, Lightweight and save transportation cost. The best choice when you are transporting unbreakable items. Enlarged 1.57-inch sealing baffle ensures safe transportation. Strong adhesive provides a reliable seal to keep your shipment secure.The bag is completely opaque to better protect your privacy.