High quality light color kraft paper that we custom from the paper manufacturer. Slightly rough surface that can be written by pencil, pen, marking pen…etc The Zipper/Ziplock is made by a Japanese brand that is resealable many times. Degassing one way valve is 100% made in Taiwan, stable and Long lasting exhaust At all times, ensuring that products have a consistent high quality is our top priority. We understand that packaging plays an important role in the presentation of products. If the product is damaged in the shipping process or other non-human factors, we will provide free replacement. Hold 4oz or 120g fine ground coffee bean, Volume may vary depending on fineness of ground coffee Our Kraft Material Our Kraft Material are custom from the paper manufacturer, light color and slightly rough. It’s the great kraft that let your packaging be perfectly separated from the common public version packaging on the market. And the Kraft Paper material are covered all over the bag, including the bottom material .   Insulate oxygen, moisture and Ultraviolet Rays In the packaging bag, we use composite materials to ensure that air, moisture and ultraviolet rays do not touch the contents. The electroplated aluminum foil in the middle layer can block ultraviolet rays, and the food-grade film in the inner layer can block air, moisture, and water vapor.   Prefessional One Way Degassing Valve 100% Made in Taiwan and exported to many countries, used by many chain brands.   We use high quality Japanese Brand Zipper/Ziplock.