Coffee bags with valve

To preserve the aroma of coffee, the bags are equipped with a one-way aroma valve. The valve reliably controls the release of oxygen, carbon dioxide, or steam. Oxygen does not cause coffee beans to age, so roasted coffee does not lose its typical aroma and taste. Bags that do not contain aluminum foil can be sealed with an impulse sealer or sealing pliers. The resealable ZIP closure keeps the coffee fresh even after the bag has been opened.