EXCELLENT MATERIALPackage of 100 adhesive-closing plastic pouches which are stronger than traditional envelopes, the polyethylene plastic film of these tear-proof pouches gives them superior resistance to humidity and tearing.Adhesive-closing plastic pouches which are stronger than conventional envelopes..ATTRIBUTE SHIPPING PACKAGING POUCH - 30 42 cm / 11.8" x 17", it can load most books, clothes, Christmas gifts, candy bags and various non-fragile products.OPENING LENGTH SHIPPING BAGS 4.8cm/1.9", a sealing strip with super strong adhesion, which cannot be opened easily after sealing, ensuring safety.PERFECT FEATURES Parcel envelope is waterproof, tear-proof, good toughness, not easy to break.Can support a weight of 3-4 kg.Pouches made from 100% recyclable plastic that is safe for the environment during incineration (no release of toxic gases)..STRONG TEAR RESISTANCEPlastic film of the pouches in 60 thickness and reinforced welds to avoid the risk of bursting.Lightweight mailing pouch for reduced postage costs..PRIVACY PROTECTION Made from an opaque black plastic film on the inside for confidentiality and bright white on the outside, the postal envelope ensures easy writing, perfect adhesion of shipping labels and a presentation that enhances your postal shipments..