Material:new PE(HDPE/LDPE) material.Safe,ecofriendly and nontoxic Size:kinds of sizes,can be customized Thickness:as requests Color:transparent or tinted Printing:can be customized.Customers must offer PSD,AI,CDR and pantone color no. to us. Features:moistureproof,dustproof Application:food,clothing, household storages,kinds of packaging ect. The opening of this bag is flat on both sides,no sealing adhesive or clip, it must be used sealing machine,tape, string ect for sealing.