ECO- Friendly Black Kraft Paper Pouches With Zipper And Window SAFE AND ECO-FRIENDLY MATERIAL Sealable bags are made of three layer construction :outside waterproof film, natural food-grade kraft and inside waterproof film, ensures that your product will be protected in an air tight environment. PRODUCT DESIGN-With a single-sided matte transparent window to ensure the clarity of the internal packaging products; Zipper closure design, easy to use and completely sealed; The side of the seal has a U-shaped groove tearing port, more convenient to open. HEAT SEALING SUPPORTED-Can be sealed by heat healing machine, convenience and provide dual seal protection to keep food fresh. WIDELY USE-Can be used to store nuts, oats, coffee beans, tea,grain, spices, jerky, snacks and more,Ideal for home, store and travel.You can attach your own brand label on the surface as a retail or sample display package.