This 4 oz matte black stand up pouch with valve is engineered for coffee, tea, and other aromatic products that demand both barrier protection and presentation. Measuring 5 1/8" x 8 1/8" + 3 1/8" bottom gusset and constructed from a durable 5.4 Mil material, this pouch offers excellent puncture resistance and protects contents from moisture, oxygen, and light. The generous 4 oz capacity is ideal for single-origin coffees, specialty blends, sample sizes, and premium dry goods where consistent portioning and professional packaging are essential. Each matte black stand up pouch is equipped with a built-in one way degassing valve that allows trapped gas, such as carbon dioxide from freshly roasted coffee, to escape without letting air back in. This preserves flavor, aroma, and freshness while preventing package bloating or rupture.