Kraft padded envelope is made from natural kraft paper with a high-slip inside lining, heavy-duty packaging envelopes, self-sealing with hot melt glue, tamper-resistant, evident closure. It's lightweight, ideal for post offices, courier express companies, logistic and parcel shipping companies, packaging wholesalers, mail order companies, shipping supplies sellers, office stationery suppliers, online retail stores, home use. A variety of sizes are available, welcome to customize.