[A Charming Aesthetic & Top-Value Pack: Nice Black color printing bags come with attractive retail-friendly flat bottm & stand up design that is perfect for packing handmade coffee and tea to gift or sell. Our high-quality packaging bags will be the first impression of your products. Food Safety Material: Matt BOPP/PET/Aluminum Foil/Food-Grade PE Four-tier design make it stronger block light keeps coffee from odor or moisture ensure the taste of coffee or powder in the bag and can also be transported over long distances and fit for long-time food preservation. Household & Commercial: Not only to ensure that the coffee is fresh home also store other nut snacks and so on; Commercia use: You can attach your own brand label on the surface as a retail or sample display package. 3 sizes available for different needs. Keep Fresh By Degassing Valve: One-way degassing valves release the pressure of trapped air and gas such as the carbon dioxide emitted by coffee beans while preventing outside air from entering the bags. "Easy Use Bags: Pull tape to open the bags and comes with resealble side zipper. Its sealed sides and flat bottom provide maximum strength allowing the bag to perform as a true stand-up pouch. Important tips: This type of bags must be sealed the top of bags by heat sealer(not included) after packing. Some type of sealers cant seal our bags. Please see picture 7 for instruction."]