One‑Way Degassing Valve & Pull‑Tab Zipper: Releases trapped CO₂ from fresh coffee while preventing outside air from entering. Resealable zipper keeps contents fresh after opening. Must Be Sealed with an Impulse Heating Sealer: Fill the pouch with coffee beans or ground coffee, then seal the top using an impulse heat sealer (not included). The flat bottom allows the bag to stand upright. Multi‑Layer Food‑Safe Material: Constructed with natural Kraft paper, an aluminum foil barrier, and an LLDPE inner lining — protects against moisture, oxygen, and light. Capacity: Holds 16 oz (1 lb) of coffee beans or ground coffee. Note: actual volume may vary depending on grind fineness. Size & Quantity: Dimensions: 5.3" W × 10.5" H × 2.8" side & bottom gusset. Package quantity: 50 pieces.